51042756 has 12 divisors (see below), whose sum is σ = 119099792. Its totient is φ = 17014248.

The previous prime is 51042749. The next prime is 51042757. The reversal of 51042756 is 65724015.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (51042757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2126770 + ... + 2126793.

Almost surely, 2^51042756 is an apocalyptic number.

It is an amenable number.

51042756 is an abundant number, since it is smaller than the sum of its proper divisors (68057036).

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

51042756 is a wasteful number, since it uses less digits than its factorization.

51042756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253570 (or 4253568 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 51042756 is about 7144.4213201630. The cubic root of 51042756 is about 370.9465804134.

The spelling of 51042756 in words is "fifty-one million, forty-two thousand, seven hundred fifty-six".