23321431 has 8 divisors (see below), whose sum is σ = 27156384. Its totient is φ = 19612320.

The previous prime is 23321413. The next prime is 23321443. The reversal of 23321431 is 13412332.

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

It is not a de Polignac number, because 23321431 - 2¹⁵ = 23288663 is a prime.

It is a super-2 number, since 2×23321431² = 1087778287775522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23321399 and 23321408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23321491) 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, 31060 + ... + 31801.

It is an arithmetic number, because the mean of its divisors is an integer number (3394548).

Almost surely, 2^23321431 is an apocalyptic number.

23321431 is a deficient number, since it is larger than the sum of its proper divisors (3834953).

23321431 is an equidigital number, since it uses as much as digits as its factorization.

23321431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62921.

The product of its digits is 432, while the sum is 19.

The square root of 23321431 is about 4829.2267496981. The cubic root of 23321431 is about 285.7053667811.

Adding to 23321431 its reverse (13412332), we get a palindrome (36733763).

Subtracting from 23321431 its reverse (13412332), we obtain a palindrome (9909099).

The spelling of 23321431 in words is "twenty-three million, three hundred twenty-one thousand, four hundred thirty-one".