51512772 has 48 divisors (see below), whose sum is σ = 123282432. Its totient is φ = 16736160.

The previous prime is 51512719. The next prime is 51512779. The reversal of 51512772 is 27721515.

It is not an unprimeable number, because it can be changed into a prime (51512779) 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, 87463 + ... + 88049.

It is an arithmetic number, because the mean of its divisors is an integer number (2568384).

Almost surely, 2^51512772 is an apocalyptic number.

It is an amenable number.

51512772 is an abundant number, since it is smaller than the sum of its proper divisors (71769660).

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

51512772 is a wasteful number, since it uses less digits than its factorization.

51512772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768 (or 766 counting only the distinct ones).

The product of its digits is 4900, while the sum is 30.

The square root of 51512772 is about 7177.2398594446. The cubic root of 51512772 is about 372.0816967060.

The spelling of 51512772 in words is "fifty-one million, five hundred twelve thousand, seven hundred seventy-two".