51519984 has 40 divisors (see below), whose sum is σ = 136695120. Its totient is φ = 16708608.

The previous prime is 51519983. The next prime is 51519991. The reversal of 51519984 is 48991515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51519983) 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, 12729 + ... + 16280.

It is an arithmetic number, because the mean of its divisors is an integer number (3417378).

Almost surely, 2^51519984 is an apocalyptic number.

It is an amenable number.

51519984 is an abundant number, since it is smaller than the sum of its proper divisors (85175136).

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

51519984 is a wasteful number, since it uses less digits than its factorization.

51519984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29057 (or 29051 counting only the distinct ones).

The product of its digits is 64800, while the sum is 42.

The square root of 51519984 is about 7177.7422634140. The cubic root of 51519984 is about 372.0990602184.

The spelling of 51519984 in words is "fifty-one million, five hundred nineteen thousand, nine hundred eighty-four".