55223556 has 48 divisors (see below), whose sum is σ = 133358400. Its totient is φ = 17774080.

The previous prime is 55223549. The next prime is 55223561. The reversal of 55223556 is 65532255.

It is a super-2 number, since 2×55223556² = 6099282274570272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52120 + ... + 53168.

It is an arithmetic number, because the mean of its divisors is an integer number (2778300).

Almost surely, 2^55223556 is an apocalyptic number.

It is an amenable number.

55223556 is an abundant number, since it is smaller than the sum of its proper divisors (78134844).

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

55223556 is a wasteful number, since it uses less digits than its factorization.

55223556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204 (or 1202 counting only the distinct ones).

The product of its digits is 45000, while the sum is 33.

The square root of 55223556 is about 7431.2553448257. The cubic root of 55223556 is about 380.8098058023.

The spelling of 55223556 in words is "fifty-five million, two hundred twenty-three thousand, five hundred fifty-six".