51457572 has 48 divisors (see below), whose sum is σ = 141261120. Its totient is φ = 16142976.

The previous prime is 51457561. The next prime is 51457573. The reversal of 51457572 is 27575415.

51457572 is a `hidden beast` number, since 5 + 14 + 575 + 72 = 666.

It is a super-2 number, since 2×51457572² = 5295763432270368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51457573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12178 + ... + 15849.

It is an arithmetic number, because the mean of its divisors is an integer number (2942940).

Almost surely, 2^51457572 is an apocalyptic number.

It is an amenable number.

51457572 is an abundant number, since it is smaller than the sum of its proper divisors (89803548).

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

51457572 is a wasteful number, since it uses less digits than its factorization.

51457572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28057 (or 28049 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 51457572 is about 7173.3933392781. The cubic root of 51457572 is about 371.9487442388.

The spelling of 51457572 in words is "fifty-one million, four hundred fifty-seven thousand, five hundred seventy-two".