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Number Numerology (数字数理)

Reduces a phone, licence-plate or account number to a number 1–81 (last four digits mod 80, or the digit sum) and reports its rating and traditional gloss from the 81 数理 table of five-grid numerology, plus the five-element mapping of its digits under the 河图 and the common 数字五行 conventions, digit counts and the digital root.

When to use

You want the traditional 81-number (数理) rating and five-element breakdown of a phone number, plate number, account tail or other digit string.

Do not use when: You want the five grids of a personal name (use name-numerology) or an I Ching hexagram cast from numbers (use meihua-yishu); ratings are cultural, not statements about luck.

Formula

last_four_mod_80: N = (last four digits) mod 80, 0 → 80. digit_sum: N = (sum of digits) mod 81, 0 → 81. digital_root = 1 + (digit_sum − 1) mod 9 (0 when digit_sum = 0). Rating and gloss from the 81 数理 table (1–81).

The 81 数理 ratings and glosses are the widely reproduced table of 熊崎健翁's five-grid school (五格剖象法), with the three-level rating 吉/半吉/凶; published versions differ for numbers 40, 43, 50, 61 and 73. Traditional reference calculation from the Chinese divination and numerology literature: it reports what the tradition assigns to the cast or number, not a prediction and not medical, legal or financial advice.

Inputs

ParameterTypeUnitRequiredDescription
numberstringyes4–20 digits (spaces, hyphens and a leading + are ignored), e.g. a phone number, the digits of a plate, or an account tail.
methodenum: last_four_mod_80 | digit_sumdefault last_four_mod_80How the number is reduced to the 1–81 range of the table.

Outputs

OutputTypeUnitDescription
numerology_numberintegerThe reduced number 1–81 looked up in the table.
ratingstring吉 (auspicious), 半吉 (mixed) or 凶 (inauspicious) per the 熊崎氏 81 数理 table.
meaning_keywordstringEight-character gloss of the number as reproduced in the popular table (cultural, several textual variants exist).
reductionstringHow the numerology number was obtained.
digit_five_elementsobjectElements of each digit and element counts under the 河图 convention (1/6 Water, 2/7 Fire, 3/8 Wood, 4/9 Metal, 5/0 Earth) and the common 数字五行 convention (1/2 Wood, 3/4 Fire, 5/6 Earth, 7/8 Metal, 9/0 Water).
digit_countsobjectHow often each digit 0–9 occurs.
digit_sumintegerSum of all digits.
digital_rootintegerDigit sum reduced repeatedly to a single digit (0 only for an all-zero number).
repeated_digitsstringDigits that occur more than once, with their counts.
disclaimerstringCultural framing of the result.

Example

Phone 13800001234, last four mod 80: {"number":"13800001234","method":"last_four_mod_80"} → {"numerology_number":34,"rating":"凶 (inauspicious)","meaning_keyword":"破家之身 见识短小","digit_sum":22,"digital_root":4,"repeated_digits":"0 ×4, 1 ×2, 3 ×2","digit_counts":{"0":4,"1":2,"3":2,"8":1}}

0000 (remainder 0 → 80): {"number":"0000","method":"last_four_mod_80"} → {"numerology_number":80,"rating":"凶 (inauspicious)","digit_sum":0,"digital_root":0,"repeated_digits":"0 ×4"}

GET https://tttkmbb.com/api/v1/calculate/number-numerology?number=13800001234&method=last_four_mod_80

Machine access

Sources

FAQ

Why the last four digits?

Popular phone-number numerology takes the last four digits (the personal part of a Chinese mobile number) mod 80 so the result falls in 1–80 of the 81 table; the digit-sum method uses the whole number.

Which five-element mapping is right?

Both are in use: the 河图 (River Map) pairs 1/6 Water, 2/7 Fire, 3/8 Wood, 4/9 Metal, 5/0 Earth; the popular 数字五行 uses 1/2 Wood, 3/4 Fire, 5/6 Earth, 7/8 Metal, 9/0 Water. The output shows both.

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