23427431 has 4 divisors (see below), whose sum is σ = 23869512. Its totient is φ = 22985352.

The previous prime is 23427427. The next prime is 23427449. The reversal of 23427431 is 13472432.

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

It is a cyclic number.

It is not a de Polignac number, because 23427431 - 2² = 23427427 is a prime.

It is a super-2 number, since 2×23427431² = 1097689046519522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23427431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23427461) 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, 220961 + ... + 221066.

It is an arithmetic number, because the mean of its divisors is an integer number (5967378).

Almost surely, 2^23427431 is an apocalyptic number.

23427431 is a deficient number, since it is larger than the sum of its proper divisors (442081).

23427431 is an equidigital number, since it uses as much as digits as its factorization.

23427431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442080.

The product of its digits is 4032, while the sum is 26.

The square root of 23427431 is about 4840.1891491965. The cubic root of 23427431 is about 286.1375729808.

Adding to 23427431 its reverse (13472432), we get a palindrome (36899863).

The spelling of 23427431 in words is "twenty-three million, four hundred twenty-seven thousand, four hundred thirty-one".