23143431 has 4 divisors (see below), whose sum is σ = 30857912. Its totient is φ = 15428952.

The previous prime is 23143429. The next prime is 23143459. The reversal of 23143431 is 13434132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23143431 - 2¹ = 23143429 is a prime.

It is a super-2 number, since 2×23143431² = 1071236796903522, 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 = 23143398 and 23143407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23143031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3857236 + ... + 3857241.

It is an arithmetic number, because the mean of its divisors is an integer number (7714478).

Almost surely, 2^23143431 is an apocalyptic number.

23143431 is a deficient number, since it is larger than the sum of its proper divisors (7714481).

23143431 is an equidigital number, since it uses as much as digits as its factorization.

23143431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7714480.

The product of its digits is 864, while the sum is 21.

The square root of 23143431 is about 4810.7619978544. The cubic root of 23143431 is about 284.9766308940.

Adding to 23143431 its reverse (13434132), we get a palindrome (36577563).

The spelling of 23143431 in words is "twenty-three million, one hundred forty-three thousand, four hundred thirty-one".