3131221044 has 48 divisors (see below), whose sum is σ = 8367177728. Its totient is φ = 892785888.

The previous prime is 3131221039. The next prime is 3131221087. The reversal of 3131221044 is 4401221313.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 3131221044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2637 + ... + 79179.

Almost surely, 2^3131221044 is an apocalyptic number.

It is an amenable number.

3131221044 is an abundant number, since it is smaller than the sum of its proper divisors (5235956684).

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

3131221044 is a wasteful number, since it uses less digits than its factorization.

3131221044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77044 (or 77042 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 3131221044 is about 55957.3144816654. The cubic root of 3131221044 is about 1462.9783830030.

Adding to 3131221044 its reverse (4401221313), we get a palindrome (7532442357).

The spelling of 3131221044 in words is "three billion, one hundred thirty-one million, two hundred twenty-one thousand, forty-four".