2166525223 has 4 divisors (see below), whose sum is σ = 2168159200. Its totient is φ = 2164891248.

The previous prime is 2166525211. The next prime is 2166525259. The reversal of 2166525223 is 3225256612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2166525223 - 2²⁹ = 1629654311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166525323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814998 + ... + 817651.

It is an arithmetic number, because the mean of its divisors is an integer number (542039800).

Almost surely, 2^2166525223 is an apocalyptic number.

2166525223 is a deficient number, since it is larger than the sum of its proper divisors (1633977).

2166525223 is a wasteful number, since it uses less digits than its factorization.

2166525223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633976.

The product of its digits is 43200, while the sum is 34.

The square root of 2166525223 is about 46545.9474390628. The cubic root of 2166525223 is about 1293.9611875585.

The spelling of 2166525223 in words is "two billion, one hundred sixty-six million, five hundred twenty-five thousand, two hundred twenty-three".