23521243 has 2 divisors, whose sum is σ = 23521244. Its totient is φ = 23521242.

The previous prime is 23521213. The next prime is 23521261. The reversal of 23521243 is 34212532.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23521243 is a prime.

It is not a weakly prime, because it can be changed into another prime (23521213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11760621 + 11760622.

It is an arithmetic number, because the mean of its divisors is an integer number (11760622).

Almost surely, 2^23521243 is an apocalyptic number.

23521243 is a deficient number, since it is larger than the sum of its proper divisors (1).

23521243 is an equidigital number, since it uses as much as digits as its factorization.

23521243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 22.

The square root of 23521243 is about 4849.8704106399. The cubic root of 23521243 is about 286.5189974682.

Adding to 23521243 its reverse (34212532), we get a palindrome (57733775).

The spelling of 23521243 in words is "twenty-three million, five hundred twenty-one thousand, two hundred forty-three".