23040431 has 2 divisors, whose sum is σ = 23040432. Its totient is φ = 23040430.

The previous prime is 23040427. The next prime is 23040439. The reversal of 23040431 is 13404032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23040431 - 2² = 23040427 is a prime.

It is a super-2 number, since 2×23040431² = 1061722921331522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23040439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11520215 + 11520216.

It is an arithmetic number, because the mean of its divisors is an integer number (11520216).

Almost surely, 2^23040431 is an apocalyptic number.

23040431 is a deficient number, since it is larger than the sum of its proper divisors (1).

23040431 is an equidigital number, since it uses as much as digits as its factorization.

23040431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 23040431 is about 4800.0448956234. The cubic root of 23040431 is about 284.5532386780.

Adding to 23040431 its reverse (13404032), we get a palindrome (36444463).

The spelling of 23040431 in words is "twenty-three million, forty thousand, four hundred thirty-one".