31872102287345 has 32 divisors (see below), whose sum is σ = 40722775142400. Its totient is φ = 23878698975936.

The previous prime is 31872102287279. The next prime is 31872102287357. The reversal of 31872102287345 is 54378220127813.

It is a cyclic number.

It is not a de Polignac number, because 31872102287345 - 2¹² = 31872102283249 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1390016 + ... + 8104094.

It is an arithmetic number, because the mean of its divisors is an integer number (1272586723200).

Almost surely, 2^{31872102287345} is an apocalyptic number.

It is an amenable number.

31872102287345 is a deficient number, since it is larger than the sum of its proper divisors (8850672855055).

31872102287345 is a wasteful number, since it uses less digits than its factorization.

31872102287345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6714677.

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 31872102287345 in words is "thirty-one trillion, eight hundred seventy-two billion, one hundred two million, two hundred eighty-seven thousand, three hundred forty-five".