55120216 has 16 divisors (see below), whose sum is σ = 108790200. Its totient is φ = 26109504.

The previous prime is 55120189. The next prime is 55120283. The reversal of 55120216 is 61202155.

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, 181165 + ... + 181468.

Almost surely, 2^55120216 is an apocalyptic number.

It is an amenable number.

55120216 is a deficient number, since it is larger than the sum of its proper divisors (53669984).

55120216 is a wasteful number, since it uses less digits than its factorization.

55120216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362658 (or 362654 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 55120216 is about 7424.2990241504. The cubic root of 55120216 is about 380.5721206501.

The spelling of 55120216 in words is "fifty-five million, one hundred twenty thousand, two hundred sixteen".