131657472 has 54 divisors (see below), whose sum is σ = 379607592. Its totient is φ = 43885056.

The previous prime is 131657453. The next prime is 131657473. The reversal of 131657472 is 274756131.

It is a happy number.

131657472 is a `hidden beast` number, since 1 + 3 + 16 + 574 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131657473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26268 + ... + 30875.

Almost surely, 2^131657472 is an apocalyptic number.

131657472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131657472 is an abundant number, since it is smaller than the sum of its proper divisors (247950120).

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

131657472 is an equidigital number, since it uses as much as digits as its factorization.

131657472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57165 (or 57148 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 131657472 is about 11474.2089923445. The cubic root of 131657472 is about 508.7235437508.

The spelling of 131657472 in words is "one hundred thirty-one million, six hundred fifty-seven thousand, four hundred seventy-two".