131891562 has 24 divisors (see below), whose sum is σ = 311744160. Its totient is φ = 39967080.

The previous prime is 131891561. The next prime is 131891647. The reversal of 131891562 is 265198131.

131891562 is a `hidden beast` number, since 1 + 3 + 1 + 8 + 91 + 562 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (131891561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332862 + ... + 333257.

It is an arithmetic number, because the mean of its divisors is an integer number (12989340).

Almost surely, 2^131891562 is an apocalyptic number.

131891562 is an abundant number, since it is smaller than the sum of its proper divisors (179852598).

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

131891562 is a wasteful number, since it uses less digits than its factorization.

131891562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666138 (or 666135 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 131891562 is about 11484.4051652665. The cubic root of 131891562 is about 509.0248726014.

The spelling of 131891562 in words is "one hundred thirty-one million, eight hundred ninety-one thousand, five hundred sixty-two".