51799920 has 40 divisors (see below), whose sum is σ = 160580496. Its totient is φ = 13813248.

The previous prime is 51799903. The next prime is 51799939. The reversal of 51799920 is 2999715.

51799920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 107677 + ... + 108156.

Almost surely, 2^51799920 is an apocalyptic number.

It is an amenable number.

51799920 is an abundant number, since it is smaller than the sum of its proper divisors (108780576).

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

51799920 is a wasteful number, since it uses less digits than its factorization.

51799920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215849 (or 215843 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 42.

The square root of 51799920 is about 7197.2161284763. The cubic root of 51799920 is about 372.7717818965.

The spelling of 51799920 in words is "fifty-one million, seven hundred ninety-nine thousand, nine hundred twenty".