51244916 has 12 divisors (see below), whose sum is σ = 91866180. Its totient is φ = 24997440.

The previous prime is 51244903. The next prime is 51244927. The reversal of 51244916 is 61944215.

It can be written as a sum of positive squares in 2 ways, for example, as 16434916 + 34810000 = 4054^2 + 5900^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156071 + ... + 156398.

It is an arithmetic number, because the mean of its divisors is an integer number (7655515).

Almost surely, 2^51244916 is an apocalyptic number.

It is an amenable number.

51244916 is a deficient number, since it is larger than the sum of its proper divisors (40621264).

51244916 is a wasteful number, since it uses less digits than its factorization.

51244916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312514 (or 312512 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 51244916 is about 7158.5554408693. Note that the first 3 decimals coincide. The cubic root of 51244916 is about 371.4356591209.

The spelling of 51244916 in words is "fifty-one million, two hundred forty-four thousand, nine hundred sixteen".