31311120444 has 24 divisors (see below), whose sum is σ = 74613735168. Its totient is φ = 10214975280.

The previous prime is 31311120443. The next prime is 31311120473. The reversal of 31311120444 is 44402111313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311120443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27757522 + ... + 27758649.

It is an arithmetic number, because the mean of its divisors is an integer number (3108905632).

Almost surely, 2^31311120444 is an apocalyptic number.

It is an amenable number.

31311120444 is an abundant number, since it is smaller than the sum of its proper divisors (43302614724).

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

31311120444 is a wasteful number, since it uses less digits than its factorization.

31311120444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55516225 (or 55516223 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 31311120444 its reverse (44402111313), we get a palindrome (75713231757).

The spelling of 31311120444 in words is "thirty-one billion, three hundred eleven million, one hundred twenty thousand, four hundred forty-four".