51212856 has 32 divisors (see below), whose sum is σ = 129657600. Its totient is φ = 16854240.

The previous prime is 51212839. The next prime is 51212897. The reversal of 51212856 is 65821215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11610 + ... + 15401.

It is an arithmetic number, because the mean of its divisors is an integer number (4051800).

Almost surely, 2^51212856 is an apocalyptic number.

It is an amenable number.

51212856 is an abundant number, since it is smaller than the sum of its proper divisors (78444744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51212856 is a wasteful number, since it uses less digits than its factorization.

51212856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27099 (or 27095 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 51212856 is about 7156.3158119245. The cubic root of 51212856 is about 371.3581833933.

The spelling of 51212856 in words is "fifty-one million, two hundred twelve thousand, eight hundred fifty-six".