2161385299 has 4 divisors (see below), whose sum is σ = 2275142440. Its totient is φ = 2047628160.

The previous prime is 2161385293. The next prime is 2161385311. The reversal of 2161385299 is 9925831612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161385299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161385293) 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, 56878542 + ... + 56878579.

It is an arithmetic number, because the mean of its divisors is an integer number (568785610).

Almost surely, 2^2161385299 is an apocalyptic number.

2161385299 is a deficient number, since it is larger than the sum of its proper divisors (113757141).

2161385299 is a wasteful number, since it uses less digits than its factorization.

2161385299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113757140.

The product of its digits is 233280, while the sum is 46.

The square root of 2161385299 is about 46490.7012100269. The cubic root of 2161385299 is about 1292.9371009092.

The spelling of 2161385299 in words is "two billion, one hundred sixty-one million, three hundred eighty-five thousand, two hundred ninety-nine".