55821936 has 20 divisors (see below), whose sum is σ = 144206792. Its totient is φ = 18607296.

The previous prime is 55821929. The next prime is 55821959. The reversal of 55821936 is 63912855.

55821936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55821894 and 55821903.

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 3 ways as a sum of consecutive naturals, for example, 581431 + ... + 581526.

Almost surely, 2^55821936 is an apocalyptic number.

It is an amenable number.

55821936 is an abundant number, since it is smaller than the sum of its proper divisors (88384856).

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

55821936 is a wasteful number, since it uses less digits than its factorization.

55821936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162968 (or 1162962 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 55821936 is about 7471.4078994524. The cubic root of 55821936 is about 382.1803010230.

The spelling of 55821936 in words is "fifty-five million, eight hundred twenty-one thousand, nine hundred thirty-six".