31343121440 has 24 divisors (see below), whose sum is σ = 74048124780. Its totient is φ = 12537248512.

The previous prime is 31343121437. The next prime is 31343121577. The reversal of 31343121440 is 4412134313.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26323115536 + 5020005904 = 162244^2 + 70852^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97947095 + ... + 97947414.

Almost surely, 2^31343121440 is an apocalyptic number.

It is an amenable number.

31343121440 is an abundant number, since it is smaller than the sum of its proper divisors (42705003340).

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

31343121440 is a wasteful number, since it uses less digits than its factorization.

31343121440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195894524 (or 195894516 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31343121440 its reverse (4412134313), we get a palindrome (35755255753).

The spelling of 31343121440 in words is "thirty-one billion, three hundred forty-three million, one hundred twenty-one thousand, four hundred forty".