23218859 has 2 divisors, whose sum is σ = 23218860. Its totient is φ = 23218858.

The previous prime is 23218847. The next prime is 23218873. The reversal of 23218859 is 95881232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23218859 - 2⁴ = 23218843 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (23218829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11609429 + 11609430.

It is an arithmetic number, because the mean of its divisors is an integer number (11609430).

Almost surely, 2^23218859 is an apocalyptic number.

23218859 is a deficient number, since it is larger than the sum of its proper divisors (1).

23218859 is an equidigital number, since it uses as much as digits as its factorization.

23218859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 23218859 is about 4818.5951272129. The cubic root of 23218859 is about 285.2858893819.

It can be divided in two parts, 232 and 18859, that added together give a palindrome (19091).

The spelling of 23218859 in words is "twenty-three million, two hundred eighteen thousand, eight hundred fifty-nine".