2165220752 has 10 divisors (see below), whose sum is σ = 4195115238. Its totient is φ = 1082610368.

The previous prime is 2165220737. The next prime is 2165220787. The reversal of 2165220752 is 2570225612.

It can be written as a sum of positive squares in only one way, i.e., 2129268736 + 35952016 = 46144^2 + 5996^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 67663133 + ... + 67663164.

Almost surely, 2^2165220752 is an apocalyptic number.

It is an amenable number.

2165220752 is a deficient number, since it is larger than the sum of its proper divisors (2029894486).

2165220752 is a wasteful number, since it uses less digits than its factorization.

2165220752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135326305 (or 135326299 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 2165220752 is about 46531.9326054700. The cubic root of 2165220752 is about 1293.7014361818.

The spelling of 2165220752 in words is "two billion, one hundred sixty-five million, two hundred twenty thousand, seven hundred fifty-two".