55509165 has 96 divisors (see below), whose sum is σ = 111922560. Its totient is φ = 26002944.

The previous prime is 55509163. The next prime is 55509193. The reversal of 55509165 is 56190555.

It is not a de Polignac number, because 55509165 - 2¹ = 55509163 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55509163) 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, 828462 + ... + 828528.

It is an arithmetic number, because the mean of its divisors is an integer number (1165860).

Almost surely, 2^55509165 is an apocalyptic number.

It is an amenable number.

55509165 is an abundant number, since it is smaller than the sum of its proper divisors (56413395).

55509165 is a wasteful number, since it uses less digits than its factorization.

55509165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 36.

The square root of 55509165 is about 7450.4473020081. The cubic root of 55509165 is about 381.4651767491.

The spelling of 55509165 in words is "fifty-five million, five hundred nine thousand, one hundred sixty-five".