86542831 has 4 divisors (see below), whose sum is σ = 86561464. Its totient is φ = 86524200.

The previous prime is 86542817. The next prime is 86542847. The reversal of 86542831 is 13824568.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 86542831 - 2²⁵ = 52988399 is a prime.

It is a super-2 number, since 2×86542831² = 14979323194989122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86542811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3916 + ... + 13726.

It is an arithmetic number, because the mean of its divisors is an integer number (21640366).

Almost surely, 2^86542831 is an apocalyptic number.

86542831 is a deficient number, since it is larger than the sum of its proper divisors (18633).

86542831 is an equidigital number, since it uses as much as digits as its factorization.

86542831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18632.

The product of its digits is 46080, while the sum is 37.

The square root of 86542831 is about 9302.8399427272. The cubic root of 86542831 is about 442.3272540092.

The spelling of 86542831 in words is "eighty-six million, five hundred forty-two thousand, eight hundred thirty-one".