51562720 has 48 divisors (see below), whose sum is σ = 132895728. Its totient is φ = 18749440.

The previous prime is 51562697. The next prime is 51562733. The reversal of 51562720 is 2726515.

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, 12889 + ... + 16408.

It is an arithmetic number, because the mean of its divisors is an integer number (2768661).

Almost surely, 2^51562720 is an apocalyptic number.

It is an amenable number.

51562720 is an abundant number, since it is smaller than the sum of its proper divisors (81333008).

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

51562720 is a wasteful number, since it uses less digits than its factorization.

51562720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29323 (or 29315 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 51562720 is about 7180.7186269899. The cubic root of 51562720 is about 372.2019175908.

The spelling of 51562720 in words is "fifty-one million, five hundred sixty-two thousand, seven hundred twenty".