23218159 has 2 divisors, whose sum is σ = 23218160. Its totient is φ = 23218158.

The previous prime is 23218147. The next prime is 23218193. The reversal of 23218159 is 95181232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23218159 - 2⁵ = 23218127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23218159.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23218859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11609079 + 11609080.

It is an arithmetic number, because the mean of its divisors is an integer number (11609080).

Almost surely, 2^23218159 is an apocalyptic number.

23218159 is a deficient number, since it is larger than the sum of its proper divisors (1).

23218159 is an equidigital number, since it uses as much as digits as its factorization.

23218159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 23218159 is about 4818.5224913868. The cubic root of 23218159 is about 285.2830224290.

The spelling of 23218159 in words is "twenty-three million, two hundred eighteen thousand, one hundred fifty-nine".