23982521 has 2 divisors, whose sum is σ = 23982522. Its totient is φ = 23982520.

The previous prime is 23982509. The next prime is 23982523. The reversal of 23982521 is 12528932.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17732521 + 6250000 = 4211^2 + 2500^2 .

It is a cyclic number.

It is not a de Polignac number, because 23982521 - 2¹⁰ = 23981497 is a prime.

It is a super-2 number, since 2×23982521² = 1150322627030882, which contains 22 as substring.

Together with 23982523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23982523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11991260 + 11991261.

It is an arithmetic number, because the mean of its divisors is an integer number (11991261).

Almost surely, 2^23982521 is an apocalyptic number.

It is an amenable number.

23982521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23982521 is an equidigital number, since it uses as much as digits as its factorization.

23982521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 23982521 is about 4897.1952176731. The cubic root of 23982521 is about 288.3798718321.

The spelling of 23982521 in words is "twenty-three million, nine hundred eighty-two thousand, five hundred twenty-one".