55297224 has 48 divisors (see below), whose sum is σ = 150106320. Its totient is φ = 18390240.

The previous prime is 55297199. The next prime is 55297241. The reversal of 55297224 is 42279255.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57919 + ... + 58865.

It is an arithmetic number, because the mean of its divisors is an integer number (3127215).

Almost surely, 2^55297224 is an apocalyptic number.

It is an amenable number.

55297224 is an abundant number, since it is smaller than the sum of its proper divisors (94809096).

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

55297224 is a wasteful number, since it uses less digits than its factorization.

55297224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770 (or 1763 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 55297224 is about 7436.2103251589. The cubic root of 55297224 is about 380.9790634743.

The spelling of 55297224 in words is "fifty-five million, two hundred ninety-seven thousand, two hundred twenty-four".