55312208 has 20 divisors (see below), whose sum is σ = 122477280. Its totient is φ = 23705184.

The previous prime is 55312189. The next prime is 55312267. The reversal of 55312208 is 80221355.

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, 246818 + ... + 247041.

It is an arithmetic number, because the mean of its divisors is an integer number (6123864).

Almost surely, 2^55312208 is an apocalyptic number.

It is an amenable number.

55312208 is an abundant number, since it is smaller than the sum of its proper divisors (67165072).

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

55312208 is a wasteful number, since it uses less digits than its factorization.

55312208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493874 (or 493868 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 55312208 is about 7437.2177593506. The cubic root of 55312208 is about 381.0134719210.

The spelling of 55312208 in words is "fifty-five million, three hundred twelve thousand, two hundred eight".