85631013 has 24 divisors (see below), whose sum is σ = 138142368. Its totient is φ = 52694064.

The previous prime is 85631003. The next prime is 85631033. The reversal of 85631013 is 31013658.

It is not a de Polignac number, because 85631013 - 2⁵ = 85630981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85631003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10395 + ... + 16712.

It is an arithmetic number, because the mean of its divisors is an integer number (5755932).

Almost surely, 2^85631013 is an apocalyptic number.

It is an amenable number.

85631013 is a deficient number, since it is larger than the sum of its proper divisors (52511355).

85631013 is a wasteful number, since it uses less digits than its factorization.

85631013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27135 (or 27123 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 85631013 is about 9253.7026643393. The cubic root of 85631013 is about 440.7683081163.

The spelling of 85631013 in words is "eighty-five million, six hundred thirty-one thousand, thirteen".