2165525253 has 16 divisors (see below), whose sum is σ = 3227874240. Its totient is φ = 1434823632.

The previous prime is 2165525231. The next prime is 2165525261. The reversal of 2165525253 is 3525255612.

2165525253 is a `hidden beast` number, since 2 + 1 + 6 + 552 + 52 + 53 = 666.

It is not a de Polignac number, because 2165525253 - 2⁵ = 2165525221 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165525953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241626 + ... + 250427.

It is an arithmetic number, because the mean of its divisors is an integer number (201742140).

Almost surely, 2^2165525253 is an apocalyptic number.

It is an amenable number.

2165525253 is a deficient number, since it is larger than the sum of its proper divisors (1062348987).

2165525253 is a wasteful number, since it uses less digits than its factorization.

2165525253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492225 (or 492219 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 2165525253 is about 46535.2044478156. The cubic root of 2165525253 is about 1293.7620789462.

The spelling of 2165525253 in words is "two billion, one hundred sixty-five million, five hundred twenty-five thousand, two hundred fifty-three".