23315819 has 2 divisors, whose sum is σ = 23315820. Its totient is φ = 23315818.

The previous prime is 23315783. The next prime is 23315821. The reversal of 23315819 is 91851332.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23315819 - 2⁸ = 23315563 is a prime.

It is a super-2 number, since 2×23315819² = 1087254831281522, which contains 22 as substring.

Together with 23315821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23315849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11657909 + 11657910.

It is an arithmetic number, because the mean of its divisors is an integer number (11657910).

Almost surely, 2^23315819 is an apocalyptic number.

23315819 is a deficient number, since it is larger than the sum of its proper divisors (1).

23315819 is an equidigital number, since it uses as much as digits as its factorization.

23315819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 23315819 is about 4828.6456693363. The cubic root of 23315819 is about 285.6824478452.

The spelling of 23315819 in words is "twenty-three million, three hundred fifteen thousand, eight hundred nineteen".