51855924 has 12 divisors (see below), whose sum is σ = 120997184. Its totient is φ = 17285304.

The previous prime is 51855913. The next prime is 51855929. The reversal of 51855924 is 42955815.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51855929) by changing a digit.

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, 2160652 + ... + 2160675.

Almost surely, 2^51855924 is an apocalyptic number.

It is an amenable number.

51855924 is an abundant number, since it is smaller than the sum of its proper divisors (69141260).

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

51855924 is a wasteful number, since it uses less digits than its factorization.

51855924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4321334 (or 4321332 counting only the distinct ones).

The product of its digits is 72000, while the sum is 39.

The square root of 51855924 is about 7201.1057484250. The cubic root of 51855924 is about 372.9060754868.

The spelling of 51855924 in words is "fifty-one million, eight hundred fifty-five thousand, nine hundred twenty-four".