55242900 has 54 divisors (see below), whose sum is σ = 173158622. Its totient is φ = 14731200.

The previous prime is 55242871. The next prime is 55242919. The reversal of 55242900 is 924255.

It can be written as a sum of positive squares in 3 ways, for example, as 156816 + 55086084 = 396^2 + 7422^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 29791 + ... + 31590.

Almost surely, 2^55242900 is an apocalyptic number.

55242900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55242900 is an abundant number, since it is smaller than the sum of its proper divisors (117915722).

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

55242900 is a wasteful number, since it uses less digits than its factorization.

55242900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61401 (or 61391 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 55242900 is about 7432.5567606309. The cubic root of 55242900 is about 380.8542646375.

The spelling of 55242900 in words is "fifty-five million, two hundred forty-two thousand, nine hundred".