86331831 has 16 divisors (see below), whose sum is σ = 124717824. Its totient is φ = 52907904.

The previous prime is 86331829. The next prime is 86331853. The reversal of 86331831 is 13813368.

It is a happy number.

It is not a de Polignac number, because 86331831 - 2¹ = 86331829 is a prime.

It is a super-2 number, since 2×86331831² = 14906370087625122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86331792 and 86331801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86331821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17491 + ... + 21876.

It is an arithmetic number, because the mean of its divisors is an integer number (7794864).

Almost surely, 2^86331831 is an apocalyptic number.

86331831 is a deficient number, since it is larger than the sum of its proper divisors (38385993).

86331831 is a wasteful number, since it uses less digits than its factorization.

86331831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39430.

The product of its digits is 10368, while the sum is 33.

The square root of 86331831 is about 9291.4923989637. The cubic root of 86331831 is about 441.9674822347.

The spelling of 86331831 in words is "eighty-six million, three hundred thirty-one thousand, eight hundred thirty-one".