2161504339 has 4 divisors (see below), whose sum is σ = 2161720456. Its totient is φ = 2161288224.

The previous prime is 2161504307. The next prime is 2161504351. The reversal of 2161504339 is 9334051612.

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 2161504339 - 2⁵ = 2161504307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161504399) 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, 92289 + ... + 113314.

It is an arithmetic number, because the mean of its divisors is an integer number (540430114).

Almost surely, 2^2161504339 is an apocalyptic number.

2161504339 is a deficient number, since it is larger than the sum of its proper divisors (216117).

2161504339 is a wasteful number, since it uses less digits than its factorization.

2161504339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216116.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 2161504339 is about 46491.9814484175. The cubic root of 2161504339 is about 1292.9608369836.

The spelling of 2161504339 in words is "two billion, one hundred sixty-one million, five hundred four thousand, three hundred thirty-nine".