131555432 has 8 divisors (see below), whose sum is σ = 246666450. Its totient is φ = 65777712.

The previous prime is 131555383. The next prime is 131555443. The reversal of 131555432 is 234555131.

It can be written as a sum of positive squares in only one way, i.e., 116079076 + 15476356 = 10774^2 + 3934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 131555395 and 131555404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8222207 + ... + 8222222.

Almost surely, 2^131555432 is an apocalyptic number.

It is an amenable number.

131555432 is a deficient number, since it is larger than the sum of its proper divisors (115111018).

131555432 is a wasteful number, since it uses less digits than its factorization.

131555432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16444435 (or 16444431 counting only the distinct ones).

The product of its digits is 9000, while the sum is 29.

The square root of 131555432 is about 11469.7616365816. The cubic root of 131555432 is about 508.5920825020.

The spelling of 131555432 in words is "one hundred thirty-one million, five hundred fifty-five thousand, four hundred thirty-two".