2165100553 has 24 divisors (see below), whose sum is σ = 2724180480. Its totient is φ = 1684372800.

The previous prime is 2165100523. The next prime is 2165100563. The reversal of 2165100553 is 3550015612.

It is not a de Polignac number, because 2165100553 - 2¹³ = 2165092361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2165100523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 642888 + ... + 646246.

It is an arithmetic number, because the mean of its divisors is an integer number (113507520).

Almost surely, 2^2165100553 is an apocalyptic number.

It is an amenable number.

2165100553 is a deficient number, since it is larger than the sum of its proper divisors (559079927).

2165100553 is a wasteful number, since it uses less digits than its factorization.

2165100553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149 (or 4138 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 2165100553 is about 46530.6410121331. The cubic root of 2165100553 is about 1293.6774964371.

The spelling of 2165100553 in words is "two billion, one hundred sixty-five million, one hundred thousand, five hundred fifty-three".