51576920 has 16 divisors (see below), whose sum is σ = 116048160. Its totient is φ = 20630752.

The previous prime is 51576911. The next prime is 51576953. The reversal of 51576920 is 2967515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644672 + ... + 644751.

It is an arithmetic number, because the mean of its divisors is an integer number (7253010).

Almost surely, 2^51576920 is an apocalyptic number.

It is an amenable number.

51576920 is an abundant number, since it is smaller than the sum of its proper divisors (64471240).

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

51576920 is a wasteful number, since it uses less digits than its factorization.

51576920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289434 (or 1289430 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 51576920 is about 7181.7073179015. The cubic root of 51576920 is about 372.2360816931.

The spelling of 51576920 in words is "fifty-one million, five hundred seventy-six thousand, nine hundred twenty".