86557131 has 12 divisors (see below), whose sum is σ = 126534408. Its totient is φ = 57009024.

The previous prime is 86557123. The next prime is 86557139. The reversal of 86557131 is 13175568.

86557131 is a `hidden beast` number, since 86 + 5 + 571 + 3 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (86557123) and next prime (86557139).

It is not a de Polignac number, because 86557131 - 2³ = 86557123 is a prime.

It is a super-2 number, since 2×86557131² = 14984273853902322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86557139) 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, 57190 + ... + 58683.

It is an arithmetic number, because the mean of its divisors is an integer number (10544534).

Almost surely, 2^86557131 is an apocalyptic number.

86557131 is a deficient number, since it is larger than the sum of its proper divisors (39977277).

86557131 is a wasteful number, since it uses less digits than its factorization.

86557131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115962 (or 115959 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 86557131 is about 9303.6084934825. The cubic root of 86557131 is about 442.3516154777.

The spelling of 86557131 in words is "eighty-six million, five hundred fifty-seven thousand, one hundred thirty-one".