2156042159 has 2 divisors, whose sum is σ = 2156042160. Its totient is φ = 2156042158.

The previous prime is 2156042131. The next prime is 2156042171. The reversal of 2156042159 is 9512406512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2156042159 - 2²⁴ = 2139264943 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156042129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078021079 + 1078021080.

It is an arithmetic number, because the mean of its divisors is an integer number (1078021080).

Almost surely, 2^2156042159 is an apocalyptic number.

2156042159 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156042159 is an equidigital number, since it uses as much as digits as its factorization.

2156042159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 2156042159 is about 46433.2010419269. The cubic root of 2156042159 is about 1291.8708026020.

The spelling of 2156042159 in words is "two billion, one hundred fifty-six million, forty-two thousand, one hundred fifty-nine".