23213569 has 2 divisors, whose sum is σ = 23213570. Its totient is φ = 23213568.

The previous prime is 23213539. The next prime is 23213581. The reversal of 23213569 is 96531232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22439169 + 774400 = 4737^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 23213569 - 2¹⁷ = 23082497 is a prime.

It is a super-2 number, since 2×23213569² = 1077739571435522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23213569.

It is not a weakly prime, because it can be changed into another prime (23213539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606784 + 11606785.

It is an arithmetic number, because the mean of its divisors is an integer number (11606785).

Almost surely, 2^23213569 is an apocalyptic number.

It is an amenable number.

23213569 is a deficient number, since it is larger than the sum of its proper divisors (1).

23213569 is an equidigital number, since it uses as much as digits as its factorization.

23213569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 31.

The square root of 23213569 is about 4818.0461807666. The cubic root of 23213569 is about 285.2642219810.

The spelling of 23213569 in words is "twenty-three million, two hundred thirteen thousand, five hundred sixty-nine".