31213044632616 has 128 divisors (see below), whose sum is σ = 97292002728960. Its totient is φ = 8106901747200.

The previous prime is 31213044632563. The next prime is 31213044632639. The reversal of 31213044632616 is 61623644031213.

It is a super-2 number, since 2×31213044632616² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39874756 + ... + 40649996.

It is an arithmetic number, because the mean of its divisors is an integer number (760093771320).

Almost surely, 2^{31213044632616} is an apocalyptic number.

It is an amenable number.

31213044632616 is an abundant number, since it is smaller than the sum of its proper divisors (66078958096344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31213044632616 is a wasteful number, since it uses less digits than its factorization.

31213044632616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797055 (or 797051 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

Adding to 31213044632616 its reverse (61623644031213), we get a palindrome (92836688663829).

The spelling of 31213044632616 in words is "thirty-one trillion, two hundred thirteen billion, forty-four million, six hundred thirty-two thousand, six hundred sixteen".