23171219 has 2 divisors, whose sum is σ = 23171220. Its totient is φ = 23171218.

The previous prime is 23171201. The next prime is 23171227. The reversal of 23171219 is 91217132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23171219 - 2²⁰ = 22122643 is a prime.

It is a super-2 number, since 2×23171219² = 1073810779891922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23171299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11585609 + 11585610.

It is an arithmetic number, because the mean of its divisors is an integer number (11585610).

Almost surely, 2^23171219 is an apocalyptic number.

23171219 is a deficient number, since it is larger than the sum of its proper divisors (1).

23171219 is an equidigital number, since it uses as much as digits as its factorization.

23171219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 26.

The square root of 23171219 is about 4813.6492394025. The cubic root of 23171219 is about 285.0906411193.

The spelling of 23171219 in words is "twenty-three million, one hundred seventy-one thousand, two hundred nineteen".