31885051057 has 4 divisors (see below), whose sum is σ = 31904894016. Its totient is φ = 31865208100.

The previous prime is 31885051031. The next prime is 31885051091. The reversal of 31885051057 is 75015058813.

It is a happy number.

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: 75015058813 = 691 ⋅108560143.

It is a cyclic number.

It is not a de Polignac number, because 31885051057 - 2²³ = 31876662449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31885051157) 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, 9919069 + ... + 9922282.

It is an arithmetic number, because the mean of its divisors is an integer number (7976223504).

Almost surely, 2^31885051057 is an apocalyptic number.

It is an amenable number.

31885051057 is a deficient number, since it is larger than the sum of its proper divisors (19842959).

31885051057 is a wasteful number, since it uses less digits than its factorization.

31885051057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19842958.

The product of its (nonzero) digits is 168000, while the sum is 43.

The spelling of 31885051057 in words is "thirty-one billion, eight hundred eighty-five million, fifty-one thousand, fifty-seven".