85213855631 has 16 divisors (see below), whose sum is σ = 91079147520. Its totient is φ = 79446837120.

The previous prime is 85213855567. The next prime is 85213855667. The reversal of 85213855631 is 13655831258.

It is a happy number.

It is not a de Polignac number, because 85213855631 - 2⁶ = 85213855567 is a prime.

It is a super-2 number, since 2×85213855631² (a number of 23 digits) 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 (85213855691) 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, 721130 + ... + 830936.

It is an arithmetic number, because the mean of its divisors is an integer number (5692446720).

Almost surely, 2^85213855631 is an apocalyptic number.

85213855631 is a deficient number, since it is larger than the sum of its proper divisors (5865291889).

85213855631 is a wasteful number, since it uses less digits than its factorization.

85213855631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110254.

The product of its digits is 864000, while the sum is 47.

The spelling of 85213855631 in words is "eighty-five billion, two hundred thirteen million, eight hundred fifty-five thousand, six hundred thirty-one".