55605500 has 24 divisors (see below), whose sum is σ = 121443504. Its totient is φ = 22242000.

The previous prime is 55605497. The next prime is 55605503. The reversal of 55605500 is 550655.

It is an interprime number because it is at equal distance from previous prime (55605497) and next prime (55605503).

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55605500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55605503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55106 + ... + 56105.

It is an arithmetic number, because the mean of its divisors is an integer number (5060146).

Almost surely, 2^55605500 is an apocalyptic number.

55605500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55605500 is an abundant number, since it is smaller than the sum of its proper divisors (65838004).

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

55605500 is a wasteful number, since it uses less digits than its factorization.

55605500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111230 (or 111218 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 55605500 is about 7456.9095475270. The cubic root of 55605500 is about 381.6857241702.

The spelling of 55605500 in words is "fifty-five million, six hundred five thousand, five hundred".