55575500 has 48 divisors (see below), whose sum is σ = 124383168. Its totient is φ = 21680000.

The previous prime is 55575493. The next prime is 55575511. The reversal of 55575500 is 557555.

It is a congruent number.

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, 19145 + ... + 21855.

It is an arithmetic number, because the mean of its divisors is an integer number (2591316).

Almost surely, 2^55575500 is an apocalyptic number.

55575500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55575500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62191584).

55575500 is an abundant number, since it is smaller than the sum of its proper divisors (68807668).

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

55575500 is a wasteful number, since it uses less digits than its factorization.

55575500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771 (or 2759 counting only the distinct ones).

The product of its (nonzero) digits is 21875, while the sum is 32.

The square root of 55575500 is about 7454.8977189496. The cubic root of 55575500 is about 381.6170701006.

The spelling of 55575500 in words is "fifty-five million, five hundred seventy-five thousand, five hundred".