51365057 has 4 divisors (see below), whose sum is σ = 51634176. Its totient is φ = 51095940.

The previous prime is 51365033. The next prime is 51365059. The reversal of 51365057 is 75056315.

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 a cyclic number.

It is not a de Polignac number, because 51365057 - 2⁸ = 51364801 is a prime.

It is a super-2 number, since 2×51365057² = 5276738161226498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51365059) 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, 134273 + ... + 134654.

It is an arithmetic number, because the mean of its divisors is an integer number (12908544).

Almost surely, 2^51365057 is an apocalyptic number.

It is an amenable number.

51365057 is a deficient number, since it is larger than the sum of its proper divisors (269119).

51365057 is a wasteful number, since it uses less digits than its factorization.

51365057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269118.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 51365057 is about 7166.9419559530. The cubic root of 51365057 is about 371.7257030054.

The spelling of 51365057 in words is "fifty-one million, three hundred sixty-five thousand, fifty-seven".