2156318023 has 2 divisors, whose sum is σ = 2156318024. Its totient is φ = 2156318022.

The previous prime is 2156317991. The next prime is 2156318039. The reversal of 2156318023 is 3208136512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2156318023 - 2⁵ = 2156317991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156318623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078159011 + 1078159012.

It is an arithmetic number, because the mean of its divisors is an integer number (1078159012).

Almost surely, 2^2156318023 is an apocalyptic number.

2156318023 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156318023 is an equidigital number, since it uses as much as digits as its factorization.

2156318023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2156318023 is about 46436.1714937827. The cubic root of 2156318023 is about 1291.9258982236.

The spelling of 2156318023 in words is "two billion, one hundred fifty-six million, three hundred eighteen thousand, twenty-three".