23191219 has 2 divisors, whose sum is σ = 23191220. Its totient is φ = 23191218.

The previous prime is 23191187. The next prime is 23191237. The reversal of 23191219 is 91219132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23191219 - 2⁵ = 23191187 is a prime.

It is a super-2 number, since 2×23191219² = 1075665277411922, which contains 22 as substring.

It is equal to p_1459513 and since 23191219 and 1459513 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23191249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11595609 + 11595610.

It is an arithmetic number, because the mean of its divisors is an integer number (11595610).

Almost surely, 2^23191219 is an apocalyptic number.

23191219 is a deficient number, since it is larger than the sum of its proper divisors (1).

23191219 is an equidigital number, since it uses as much as digits as its factorization.

23191219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 28.

The square root of 23191219 is about 4815.7262173010. The cubic root of 23191219 is about 285.1726418853.

The spelling of 23191219 in words is "twenty-three million, one hundred ninety-one thousand, two hundred nineteen".