131857806 has 16 divisors (see below), whose sum is σ = 264228048. Its totient is φ = 43867200.

The previous prime is 131857801. The next prime is 131857807. The reversal of 131857806 is 608758131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131857801) 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, 17965 + ... + 24216.

It is an arithmetic number, because the mean of its divisors is an integer number (16514253).

Almost surely, 2^131857806 is an apocalyptic number.

131857806 is an abundant number, since it is smaller than the sum of its proper divisors (132370242).

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

131857806 is a wasteful number, since it uses less digits than its factorization.

131857806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42707.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 131857806 is about 11482.9354261008. The cubic root of 131857806 is about 508.9814427073.

The spelling of 131857806 in words is "one hundred thirty-one million, eight hundred fifty-seven thousand, eight hundred six".