2165245572 has 24 divisors (see below), whose sum is σ = 5773988416. Its totient is φ = 618641568.

The previous prime is 2165245549. The next prime is 2165245573. The reversal of 2165245572 is 2755425612.

It is a self number, because there is not a number n which added to its sum of digits gives 2165245572.

It is not an unprimeable number, because it can be changed into a prime (2165245573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12888283 + ... + 12888450.

Almost surely, 2^2165245572 is an apocalyptic number.

It is an amenable number.

2165245572 is an abundant number, since it is smaller than the sum of its proper divisors (3608742844).

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

2165245572 is a wasteful number, since it uses less digits than its factorization.

2165245572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25776747 (or 25776745 counting only the distinct ones).

The product of its digits is 168000, while the sum is 39.

The square root of 2165245572 is about 46532.1993032782. The cubic root of 2165245572 is about 1293.7063794110.

The spelling of 2165245572 in words is "two billion, one hundred sixty-five million, two hundred forty-five thousand, five hundred seventy-two".