51464880 has 60 divisors (see below), whose sum is σ = 172838640. Its totient is φ = 13723776.

The previous prime is 51464857. The next prime is 51464887. The reversal of 51464880 is 8846415.

51464880 is a `hidden beast` number, since 5 + 1 + 4 + 648 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51464887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35020 + ... + 36459.

It is an arithmetic number, because the mean of its divisors is an integer number (2880644).

Almost surely, 2^51464880 is an apocalyptic number.

It is an amenable number.

51464880 is an abundant number, since it is smaller than the sum of its proper divisors (121373760).

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

51464880 is a wasteful number, since it uses less digits than its factorization.

51464880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71498 (or 71489 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 51464880 is about 7173.9027035499. The cubic root of 51464880 is about 371.9663514483.

The spelling of 51464880 in words is "fifty-one million, four hundred sixty-four thousand, eight hundred eighty".