31513113453 has 32 divisors (see below), whose sum is σ = 44295621120. Its totient is φ = 19906240320.

The previous prime is 31513113439. The next prime is 31513113479. The reversal of 31513113453 is 35431131513.

It is not a de Polignac number, because 31513113453 - 2⁶ = 31513113389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31513113453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31513113403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 678258 + ... + 723228.

It is an arithmetic number, because the mean of its divisors is an integer number (1384238160).

Almost surely, 2^31513113453 is an apocalyptic number.

It is an amenable number.

31513113453 is a deficient number, since it is larger than the sum of its proper divisors (12782507667).

31513113453 is a wasteful number, since it uses less digits than its factorization.

31513113453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45177.

The product of its digits is 8100, while the sum is 30.

Adding to 31513113453 its reverse (35431131513), we get a palindrome (66944244966).

The spelling of 31513113453 in words is "thirty-one billion, five hundred thirteen million, one hundred thirteen thousand, four hundred fifty-three".