23156449 has 2 divisors, whose sum is σ = 23156450. Its totient is φ = 23156448.

The previous prime is 23156417. The next prime is 23156501. The reversal of 23156449 is 94465132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 3972049 = 4380^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 23156449 - 2⁵ = 23156417 is a prime.

It is a super-2 number, since 2×23156449² = 1072442260579202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23156249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11578224 + 11578225.

It is an arithmetic number, because the mean of its divisors is an integer number (11578225).

Almost surely, 2^23156449 is an apocalyptic number.

It is an amenable number.

23156449 is a deficient number, since it is larger than the sum of its proper divisors (1).

23156449 is an equidigital number, since it uses as much as digits as its factorization.

23156449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 23156449 is about 4812.1148157541. The cubic root of 23156449 is about 285.0300532584.

The spelling of 23156449 in words is "twenty-three million, one hundred fifty-six thousand, four hundred forty-nine".