31312401005540 has 24 divisors (see below), whose sum is σ = 65904475633920. Its totient is φ = 12496687350368.

The previous prime is 31312401005491. The next prime is 31312401005563. The reversal of 31312401005540 is 4550010421313.

It is a super-2 number, since 2×31312401005540² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1767056660 + ... + 1767074379.

It is an arithmetic number, because the mean of its divisors is an integer number (2746019818080).

Almost surely, 2^{31312401005540} is an apocalyptic number.

It is an amenable number.

31312401005540 is an abundant number, since it is smaller than the sum of its proper divisors (34592074628380).

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

31312401005540 is a wasteful number, since it uses less digits than its factorization.

31312401005540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534131491 (or 3534131489 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 31312401005540 its reverse (4550010421313), we get a palindrome (35862411426853).

The spelling of 31312401005540 in words is "thirty-one trillion, three hundred twelve billion, four hundred one million, five thousand, five hundred forty".