51102057 has 4 divisors (see below), whose sum is σ = 68136080. Its totient is φ = 34068036.

The previous prime is 51102049. The next prime is 51102127. The reversal of 51102057 is 75020115.

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.

It is not a de Polignac number, because 51102057 - 2³ = 51102049 is a prime.

It is a super-2 number, since 2×51102057² = 5222840459262498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51102157) 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, 8517007 + ... + 8517012.

It is an arithmetic number, because the mean of its divisors is an integer number (17034020).

Almost surely, 2^51102057 is an apocalyptic number.

It is an amenable number.

51102057 is a deficient number, since it is larger than the sum of its proper divisors (17034023).

51102057 is a wasteful number, since it uses less digits than its factorization.

51102057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17034022.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 51102057 is about 7148.5702766357. The cubic root of 51102057 is about 371.0901789149.

The spelling of 51102057 in words is "fifty-one million, one hundred two thousand, fifty-seven".