51507984 has 40 divisors (see below), whose sum is σ = 145160352. Its totient is φ = 15608320.

The previous prime is 51507947. The next prime is 51508001. The reversal of 51507984 is 48970515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48249 + ... + 49304.

Almost surely, 2^51507984 is an apocalyptic number.

It is an amenable number.

51507984 is an abundant number, since it is smaller than the sum of its proper divisors (93652368).

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

51507984 is a wasteful number, since it uses less digits than its factorization.

51507984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97575 (or 97569 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 51507984 is about 7176.9062972844. The cubic root of 51507984 is about 372.0701682876.

The spelling of 51507984 in words is "fifty-one million, five hundred seven thousand, nine hundred eighty-four".