51057057113 has 4 divisors (see below), whose sum is σ = 51429736500. Its totient is φ = 50684377728.

The previous prime is 51057057109. The next prime is 51057057167. The reversal of 51057057113 is 31175075015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40669982224 + 10387074889 = 201668^2 + 101917^2 .

It is a cyclic number.

It is not a de Polignac number, because 51057057113 - 2² = 51057057109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51057057193) 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, 186339488 + ... + 186339761.

It is an arithmetic number, because the mean of its divisors is an integer number (12857434125).

Almost surely, 2^51057057113 is an apocalyptic number.

It is an amenable number.

51057057113 is a deficient number, since it is larger than the sum of its proper divisors (372679387).

51057057113 is a wasteful number, since it uses less digits than its factorization.

51057057113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372679386.

The product of its (nonzero) digits is 18375, while the sum is 35.

The spelling of 51057057113 in words is "fifty-one billion, fifty-seven million, fifty-seven thousand, one hundred thirteen".