55165500 has 288 divisors, whose sum is σ = 200333952. Its totient is φ = 12672000.

The previous prime is 55165471. The next prime is 55165501. The reversal of 55165500 is 556155.

55165500 is a `hidden beast` number, since 5 + 5 + 1 + 655 + 0 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55165501) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1345480 + ... + 1345520.

It is an arithmetic number, because the mean of its divisors is an integer number (695604).

Almost surely, 2^55165500 is an apocalyptic number.

55165500 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 55165500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100166976).

55165500 is an abundant number, since it is smaller than the sum of its proper divisors (145168452).

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

55165500 is a wasteful number, since it uses less digits than its factorization.

55165500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 55165500 is about 7427.3481135598. The cubic root of 55165500 is about 380.6763117668.

The spelling of 55165500 in words is "fifty-five million, one hundred sixty-five thousand, five hundred".