2165159507 has 4 divisors (see below), whose sum is σ = 2474468016. Its totient is φ = 1855851000.

The previous prime is 2165159501. The next prime is 2165159537. The reversal of 2165159507 is 7059515612.

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 2165159507 - 2⁸ = 2165159251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165159501) 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, 154654244 + ... + 154654257.

It is an arithmetic number, because the mean of its divisors is an integer number (618617004).

Almost surely, 2^2165159507 is an apocalyptic number.

2165159507 is a deficient number, since it is larger than the sum of its proper divisors (309308509).

2165159507 is an equidigital number, since it uses as much as digits as its factorization.

2165159507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309308508.

The product of its (nonzero) digits is 94500, while the sum is 41.

The square root of 2165159507 is about 46531.2745043589. The cubic root of 2165159507 is about 1293.6892382737.

The spelling of 2165159507 in words is "two billion, one hundred sixty-five million, one hundred fifty-nine thousand, five hundred seven".