2156632193 has 2 divisors, whose sum is σ = 2156632194. Its totient is φ = 2156632192.

The previous prime is 2156632151. The next prime is 2156632201. The reversal of 2156632193 is 3912366512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1725322369 + 431309824 = 41537^2 + 20768^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156632193 - 2⁶ = 2156632129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2156632993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078316096 + 1078316097.

It is an arithmetic number, because the mean of its divisors is an integer number (1078316097).

Almost surely, 2^2156632193 is an apocalyptic number.

It is an amenable number.

2156632193 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156632193 is an equidigital number, since it uses as much as digits as its factorization.

2156632193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 2156632193 is about 46439.5541860600. The cubic root of 2156632193 is about 1291.9886386055.

The spelling of 2156632193 in words is "two billion, one hundred fifty-six million, six hundred thirty-two thousand, one hundred ninety-three".