23156219 has 2 divisors, whose sum is σ = 23156220. Its totient is φ = 23156218.

The previous prime is 23156209. The next prime is 23156249. The reversal of 23156219 is 91265132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23156219 - 2²⁰ = 22107643 is a prime.

It is a super-2 number, since 2×23156219² = 1072420956751922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23156191 and 23156200.

It is not a weakly prime, because it can be changed into another prime (23156209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11578109 + 11578110.

It is an arithmetic number, because the mean of its divisors is an integer number (11578110).

Almost surely, 2^23156219 is an apocalyptic number.

23156219 is a deficient number, since it is larger than the sum of its proper divisors (1).

23156219 is an equidigital number, since it uses as much as digits as its factorization.

23156219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 23156219 is about 4812.0909176781. The cubic root of 23156219 is about 285.0291095741.

The spelling of 23156219 in words is "twenty-three million, one hundred fifty-six thousand, two hundred nineteen".