51324816 has 20 divisors (see below), whose sum is σ = 132589232. Its totient is φ = 17108256.

The previous prime is 51324811. The next prime is 51324817. The reversal of 51324816 is 61842315.

It is not an unprimeable number, because it can be changed into a prime (51324811) 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, 534586 + ... + 534681.

Almost surely, 2^51324816 is an apocalyptic number.

It is an amenable number.

51324816 is an abundant number, since it is smaller than the sum of its proper divisors (81264416).

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

51324816 is a wasteful number, since it uses less digits than its factorization.

51324816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069278 (or 1069272 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 51324816 is about 7164.1340020968. The cubic root of 51324816 is about 371.6286037779.

The spelling of 51324816 in words is "fifty-one million, three hundred twenty-four thousand, eight hundred sixteen".