51212238 has 32 divisors (see below), whose sum is σ = 127699200. Its totient is φ = 13301760.

The previous prime is 51212221. The next prime is 51212261. The reversal of 51212238 is 83221215.

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, 54963 + ... + 55886.

It is an arithmetic number, because the mean of its divisors is an integer number (3990600).

Almost surely, 2^51212238 is an apocalyptic number.

51212238 is an abundant number, since it is smaller than the sum of its proper divisors (76486962).

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

51212238 is a wasteful number, since it uses less digits than its factorization.

51212238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110872.

The product of its digits is 960, while the sum is 24.

The square root of 51212238 is about 7156.2726331520. The cubic root of 51212238 is about 371.3566896260.

The spelling of 51212238 in words is "fifty-one million, two hundred twelve thousand, two hundred thirty-eight".