51515952 has 40 divisors (see below), whose sum is σ = 138872064. Its totient is φ = 16425024.

The previous prime is 51515941. The next prime is 51515953. The reversal of 51515952 is 25951515.

It is not an unprimeable number, because it can be changed into a prime (51515953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22228 + ... + 24435.

Almost surely, 2^51515952 is an apocalyptic number.

It is an amenable number.

51515952 is an abundant number, since it is smaller than the sum of its proper divisors (87356112).

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

51515952 is a wasteful number, since it uses less digits than its factorization.

51515952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46697 (or 46691 counting only the distinct ones).

The product of its digits is 11250, while the sum is 33.

The square root of 51515952 is about 7177.4613896558. The cubic root of 51515952 is about 372.0893530302.

The spelling of 51515952 in words is "fifty-one million, five hundred fifteen thousand, nine hundred fifty-two".