31738508943513 has 16 divisors (see below), whose sum is σ = 42781495396416. Its totient is φ = 20927541934080.

The previous prime is 31738508943473. The next prime is 31738508943539. The reversal of 31738508943513 is 31534980583713.

It is a happy number.

It is not a de Polignac number, because 31738508943513 - 2²⁵ = 31738475389081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31738508943013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34255456 + ... + 35169777.

It is an arithmetic number, because the mean of its divisors is an integer number (2673843462276).

Almost surely, 2^{31738508943513} is an apocalyptic number.

It is an amenable number.

31738508943513 is a deficient number, since it is larger than the sum of its proper divisors (11042986452903).

31738508943513 is a wasteful number, since it uses less digits than its factorization.

31738508943513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69426904.

The product of its (nonzero) digits is 32659200, while the sum is 60.

The spelling of 31738508943513 in words is "thirty-one trillion, seven hundred thirty-eight billion, five hundred eight million, nine hundred forty-three thousand, five hundred thirteen".