2166515423 has 2 divisors, whose sum is σ = 2166515424. Its totient is φ = 2166515422.

The previous prime is 2166515381. The next prime is 2166515447. The reversal of 2166515423 is 3245156612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2166515423 - 2⁸ = 2166515167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166515473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083257711 + 1083257712.

It is an arithmetic number, because the mean of its divisors is an integer number (1083257712).

Almost surely, 2^2166515423 is an apocalyptic number.

2166515423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166515423 is an equidigital number, since it uses as much as digits as its factorization.

2166515423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 35.

The square root of 2166515423 is about 46545.8421666211. The cubic root of 2166515423 is about 1293.9592365329.

The spelling of 2166515423 in words is "two billion, one hundred sixty-six million, five hundred fifteen thousand, four hundred twenty-three".