2156318039 has 2 divisors, whose sum is σ = 2156318040. Its totient is φ = 2156318038.

The previous prime is 2156318023. The next prime is 2156318071. The reversal of 2156318039 is 9308136512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156318039 - 2⁴ = 2156318023 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2156317993 and 2156318011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156348039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078159019 + 1078159020.

It is an arithmetic number, because the mean of its divisors is an integer number (1078159020).

Almost surely, 2^2156318039 is an apocalyptic number.

2156318039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156318039 is an equidigital number, since it uses as much as digits as its factorization.

2156318039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 2156318039 is about 46436.1716660622. The cubic root of 2156318039 is about 1291.9259014190.

The spelling of 2156318039 in words is "two billion, one hundred fifty-six million, three hundred eighteen thousand, thirty-nine".