51512855 has 16 divisors (see below), whose sum is σ = 64416000. Its totient is φ = 39502080.

The previous prime is 51512849. The next prime is 51512869. The reversal of 51512855 is 55821515.

It is not a de Polignac number, because 51512855 - 2⁸ = 51512599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15371 + ... + 18419.

It is an arithmetic number, because the mean of its divisors is an integer number (4026000).

Almost surely, 2^51512855 is an apocalyptic number.

51512855 is a deficient number, since it is larger than the sum of its proper divisors (12903145).

51512855 is a wasteful number, since it uses less digits than its factorization.

51512855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194.

The product of its digits is 10000, while the sum is 32.

The square root of 51512855 is about 7177.2456416093. The cubic root of 51512855 is about 372.0818965449.

The spelling of 51512855 in words is "fifty-one million, five hundred twelve thousand, eight hundred fifty-five".