31654560513 has 4 divisors (see below), whose sum is σ = 42206080688. Its totient is φ = 21103040340.

The previous prime is 31654560503. The next prime is 31654560517. The reversal of 31654560513 is 31506545613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31506545613 = 3 ⋅10502181871.

It is not a de Polignac number, because 31654560513 - 2⁹ = 31654560001 is a prime.

It is a super-2 number, since 2×31654560513² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31654560517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5275760083 + ... + 5275760088.

It is an arithmetic number, because the mean of its divisors is an integer number (10551520172).

Almost surely, 2^31654560513 is an apocalyptic number.

It is an amenable number.

31654560513 is a deficient number, since it is larger than the sum of its proper divisors (10551520175).

31654560513 is a wasteful number, since it uses less digits than its factorization.

31654560513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10551520174.

The product of its (nonzero) digits is 162000, while the sum is 39.

The spelling of 31654560513 in words is "thirty-one billion, six hundred fifty-four million, five hundred sixty thousand, five hundred thirteen".