51564004 has 24 divisors (see below), whose sum is σ = 92176448. Its totient is φ = 25233120.

The previous prime is 51563989. The next prime is 51564031. The reversal of 51564004 is 40046515.

51564004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51564004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47977 + ... + 49039.

Almost surely, 2^51564004 is an apocalyptic number.

It is an amenable number.

51564004 is a deficient number, since it is larger than the sum of its proper divisors (40612444).

51564004 is a wasteful number, since it uses less digits than its factorization.

51564004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51564004 is about 7180.8080325267. The cubic root of 51564004 is about 372.2050070535.

The spelling of 51564004 in words is "fifty-one million, five hundred sixty-four thousand, four".