55218056 has 8 divisors (see below), whose sum is σ = 103533870. Its totient is φ = 27609024.

The previous prime is 55218029. The next prime is 55218061. The reversal of 55218056 is 65081255.

It can be written as a sum of positive squares in only one way, i.e., 35593156 + 19624900 = 5966^2 + 4430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3451121 + ... + 3451136.

Almost surely, 2^55218056 is an apocalyptic number.

It is an amenable number.

55218056 is a deficient number, since it is larger than the sum of its proper divisors (48315814).

55218056 is a wasteful number, since it uses less digits than its factorization.

55218056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6902263 (or 6902259 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 55218056 is about 7430.8852770043. The cubic root of 55218056 is about 380.7971631088.

The spelling of 55218056 in words is "fifty-five million, two hundred eighteen thousand, fifty-six".