55216568 has 32 divisors (see below), whose sum is σ = 113272560. Its totient is φ = 25025280.

The previous prime is 55216559. The next prime is 55216591. The reversal of 55216568 is 86561255.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39530 + ... + 40902.

Almost surely, 2^55216568 is an apocalyptic number.

It is an amenable number.

55216568 is an abundant number, since it is smaller than the sum of its proper divisors (58055992).

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

55216568 is a wasteful number, since it uses less digits than its factorization.

55216568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847 (or 1843 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The square root of 55216568 is about 7430.7851536698. The cubic root of 55216568 is about 380.7937425413.

The spelling of 55216568 in words is "fifty-five million, two hundred sixteen thousand, five hundred sixty-eight".