23281431 has 8 divisors (see below), whose sum is σ = 31141104. Its totient is φ = 15471360.

The previous prime is 23281387. The next prime is 23281439. The reversal of 23281431 is 13418232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23281431 - 2⁶ = 23281367 is a prime.

It is a super-2 number, since 2×23281431² = 1084050058815522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23281439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11290 + ... + 13191.

It is an arithmetic number, because the mean of its divisors is an integer number (3892638).

Almost surely, 2^23281431 is an apocalyptic number.

23281431 is a deficient number, since it is larger than the sum of its proper divisors (7859673).

23281431 is a wasteful number, since it uses less digits than its factorization.

23281431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24801.

The product of its digits is 1152, while the sum is 24.

The square root of 23281431 is about 4825.0835225932. The cubic root of 23281431 is about 285.5419297741.

Adding to 23281431 its reverse (13418232), we get a palindrome (36699663).

The spelling of 23281431 in words is "twenty-three million, two hundred eighty-one thousand, four hundred thirty-one".