55721084 has 12 divisors (see below), whose sum is σ = 98885808. Its totient is φ = 27468000.

The previous prime is 55721063. The next prime is 55721117. The reversal of 55721084 is 48012755.

It is a self number, because there is not a number n which added to its sum of digits gives 55721084.

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, 97817 + ... + 98384.

It is an arithmetic number, because the mean of its divisors is an integer number (8240484).

Almost surely, 2^55721084 is an apocalyptic number.

It is an amenable number.

55721084 is a deficient number, since it is larger than the sum of its proper divisors (43164724).

55721084 is a wasteful number, since it uses less digits than its factorization.

55721084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196276 (or 196274 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 55721084 is about 7464.6556518034. The cubic root of 55721084 is about 381.9500039646.

The spelling of 55721084 in words is "fifty-five million, seven hundred twenty-one thousand, eighty-four".