2161515593 has 2 divisors, whose sum is σ = 2161515594. Its totient is φ = 2161515592.

The previous prime is 2161515553. The next prime is 2161515599. The reversal of 2161515593 is 3955151612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1880349769 + 281165824 = 43363^2 + 16768^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161515593 - 2¹⁰ = 2161514569 is a prime.

It is not a weakly prime, because it can be changed into another prime (2161515599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080757796 + 1080757797.

It is an arithmetic number, because the mean of its divisors is an integer number (1080757797).

Almost surely, 2^2161515593 is an apocalyptic number.

It is an amenable number.

2161515593 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161515593 is an equidigital number, since it uses as much as digits as its factorization.

2161515593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40500, while the sum is 38.

The square root of 2161515593 is about 46492.1024798836. The cubic root of 2161515593 is about 1292.9630809387.

The spelling of 2161515593 in words is "two billion, one hundred sixty-one million, five hundred fifteen thousand, five hundred ninety-three".