23212529 has 2 divisors, whose sum is σ = 23212530. Its totient is φ = 23212528.

The previous prime is 23212523. The next prime is 23212537. The reversal of 23212529 is 92521232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 7011904 = 4025^2 + 2648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23212529 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23212498 and 23212507.

It is not a weakly prime, because it can be changed into another prime (23212523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606264 + 11606265.

It is an arithmetic number, because the mean of its divisors is an integer number (11606265).

Almost surely, 2^23212529 is an apocalyptic number.

It is an amenable number.

23212529 is a deficient number, since it is larger than the sum of its proper divisors (1).

23212529 is an equidigital number, since it uses as much as digits as its factorization.

23212529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 23212529 is about 4817.9382519912. The cubic root of 23212529 is about 285.2599618401.

The spelling of 23212529 in words is "twenty-three million, two hundred twelve thousand, five hundred twenty-nine".