51930144 has 72 divisors (see below), whose sum is σ = 168779520. Its totient is φ = 14836608.

The previous prime is 51930127. The next prime is 51930157. The reversal of 51930144 is 44103915.

51930144 is a `hidden beast` number, since 519 + 3 + 0 + 144 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10864 + ... + 14895.

It is an arithmetic number, because the mean of its divisors is an integer number (2344160).

Almost surely, 2^51930144 is an apocalyptic number.

It is an amenable number.

51930144 is an abundant number, since it is smaller than the sum of its proper divisors (116849376).

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

51930144 is a wasteful number, since it uses less digits than its factorization.

51930144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25782 (or 25771 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 51930144 is about 7206.2572810024. The cubic root of 51930144 is about 373.0839008459.

The spelling of 51930144 in words is "fifty-one million, nine hundred thirty thousand, one hundred forty-four".