51252864 has 64 divisors (see below), whose sum is σ = 146627040. Its totient is φ = 15768576.

The previous prime is 51252857. The next prime is 51252907. The reversal of 51252864 is 46825215.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142 + ... + 10125.

Almost surely, 2^51252864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51252864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73313520).

51252864 is an abundant number, since it is smaller than the sum of its proper divisors (95374176).

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

51252864 is a wasteful number, since it uses less digits than its factorization.

51252864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10297 (or 10285 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 51252864 is about 7159.1105592804. The cubic root of 51252864 is about 371.4548611428.

The spelling of 51252864 in words is "fifty-one million, two hundred fifty-two thousand, eight hundred sixty-four".