51204664 has 16 divisors (see below), whose sum is σ = 109724400. Its totient is φ = 21944832.

The previous prime is 51204649. The next prime is 51204721. The reversal of 51204664 is 46640215.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 457129 + ... + 457240.

It is an arithmetic number, because the mean of its divisors is an integer number (6857775).

Almost surely, 2^51204664 is an apocalyptic number.

It is an amenable number.

51204664 is an abundant number, since it is smaller than the sum of its proper divisors (58519736).

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

51204664 is a wasteful number, since it uses less digits than its factorization.

51204664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914382 (or 914378 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 51204664 is about 7155.7434274854. The cubic root of 51204664 is about 371.3383815395.

Adding to 51204664 its reverse (46640215), we get a palindrome (97844879).

The spelling of 51204664 in words is "fifty-one million, two hundred four thousand, six hundred sixty-four".