23323521 has 24 divisors (see below), whose sum is σ = 33994080. Its totient is φ = 14217216.

The previous prime is 23323519. The next prime is 23323523. The reversal of 23323521 is 12532332.

It is an interprime number because it is at equal distance from previous prime (23323519) and next prime (23323523).

It is not a de Polignac number, because 23323521 - 2¹ = 23323519 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23323523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90625 + ... + 90881.

It is an arithmetic number, because the mean of its divisors is an integer number (1416420).

Almost surely, 2^23323521 is an apocalyptic number.

It is an amenable number.

23323521 is a deficient number, since it is larger than the sum of its proper divisors (10670559).

23323521 is a wasteful number, since it uses less digits than its factorization.

23323521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 452 counting only the distinct ones).

The product of its digits is 1080, while the sum is 21.

The square root of 23323521 is about 4829.4431356006. The cubic root of 23323521 is about 285.7139012257.

Adding to 23323521 its reverse (12532332), we get a palindrome (35855853).

The spelling of 23323521 in words is "twenty-three million, three hundred twenty-three thousand, five hundred twenty-one".