23212431 has 24 divisors (see below), whose sum is σ = 37571664. Its totient is φ = 13685760.

The previous prime is 23212403. The next prime is 23212439. The reversal of 23212431 is 13421232.

23212431 is a `hidden beast` number, since 23 + 212 + 431 = 666.

It is not a de Polignac number, because 23212431 - 2¹⁸ = 22950287 is a prime.

It is a super-2 number, since 2×23212431² = 1077633905859522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23212439) 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, 495 + ... + 6831.

It is an arithmetic number, because the mean of its divisors is an integer number (1565486).

Almost surely, 2^23212431 is an apocalyptic number.

23212431 is a deficient number, since it is larger than the sum of its proper divisors (14359233).

23212431 is a wasteful number, since it uses less digits than its factorization.

23212431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391 (or 6388 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 23212431 is about 4817.9280816550. The cubic root of 23212431 is about 285.2595603972.

Adding to 23212431 its reverse (13421232), we get a palindrome (36633663).

The spelling of 23212431 in words is "twenty-three million, two hundred twelve thousand, four hundred thirty-one".