131232906 has 32 divisors (see below), whose sum is σ = 333290880. Its totient is φ = 37495008.

The previous prime is 131232887. The next prime is 131232931. The reversal of 131232906 is 609232131.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 131232906.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173211 + ... + 173966.

It is an arithmetic number, because the mean of its divisors is an integer number (10415340).

Almost surely, 2^131232906 is an apocalyptic number.

131232906 is an abundant number, since it is smaller than the sum of its proper divisors (202057974).

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

131232906 is a wasteful number, since it uses less digits than its factorization.

131232906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347195 (or 347189 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 131232906 is about 11455.6931697737. The cubic root of 131232906 is about 508.1761148726.

The spelling of 131232906 in words is "one hundred thirty-one million, two hundred thirty-two thousand, nine hundred six".