31310053857 has 6 divisors (see below), whose sum is σ = 45225633362. Its totient is φ = 20873369232.

The previous prime is 31310053829. The next prime is 31310053877. The reversal of 31310053857 is 75835001313.

It is a happy number.

31310053857 is a `hidden beast` number, since 3 + 13 + 100 + 538 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31129662096 + 180391761 = 176436^2 + 13431^2 .

It is not a de Polignac number, because 31310053857 - 2¹⁰ = 31310052833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31310053877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1739447428 + ... + 1739447445.

Almost surely, 2^31310053857 is an apocalyptic number.

It is an amenable number.

31310053857 is a deficient number, since it is larger than the sum of its proper divisors (13915579505).

31310053857 is a wasteful number, since it uses less digits than its factorization.

31310053857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478894879 (or 3478894876 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The spelling of 31310053857 in words is "thirty-one billion, three hundred ten million, fifty-three thousand, eight hundred fifty-seven".