55520208 has 40 divisors (see below), whose sum is σ = 159364800. Its totient is φ = 18506592.

The previous prime is 55520189. The next prime is 55520233. The reversal of 55520208 is 80202555.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 63828 + ... + 64691.

It is an arithmetic number, because the mean of its divisors is an integer number (3984120).

Almost surely, 2^55520208 is an apocalyptic number.

It is an amenable number.

55520208 is an abundant number, since it is smaller than the sum of its proper divisors (103844592).

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

55520208 is a wasteful number, since it uses less digits than its factorization.

55520208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128536 (or 128524 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 55520208 is about 7451.1883615971. The cubic root of 55520208 is about 381.4904713147.

The spelling of 55520208 in words is "fifty-five million, five hundred twenty thousand, two hundred eight".