131631380 has 24 divisors (see below), whose sum is σ = 279928320. Its totient is φ = 51985440.

The previous prime is 131631371. The next prime is 131631389. The reversal of 131631380 is 83136131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131631371) and next prime (131631389).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131631389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40076 + ... + 43235.

It is an arithmetic number, because the mean of its divisors is an integer number (11663680).

Almost surely, 2^131631380 is an apocalyptic number.

131631380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131631380 is an abundant number, since it is smaller than the sum of its proper divisors (148296940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131631380 is a wasteful number, since it uses less digits than its factorization.

131631380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83399 (or 83397 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 131631380 is about 11473.0719513128. The cubic root of 131631380 is about 508.6899350958.

The spelling of 131631380 in words is "one hundred thirty-one million, six hundred thirty-one thousand, three hundred eighty".