55723216 has 20 divisors (see below), whose sum is σ = 108264772. Its totient is φ = 27783936.

The previous prime is 55723189. The next prime is 55723231. The reversal of 55723216 is 61232755.

It can be written as a sum of positive squares in 2 ways, for example, as 43612816 + 12110400 = 6604^2 + 3480^2 .

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, 1300 + ... + 10636.

Almost surely, 2^55723216 is an apocalyptic number.

It is an amenable number.

55723216 is a deficient number, since it is larger than the sum of its proper divisors (52541556).

55723216 is a wasteful number, since it uses less digits than its factorization.

55723216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9718 (or 9712 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 55723216 is about 7464.7984567569. The cubic root of 55723216 is about 381.9548752925.

The spelling of 55723216 in words is "fifty-five million, seven hundred twenty-three thousand, two hundred sixteen".