23271431 has 2 divisors, whose sum is σ = 23271432. Its totient is φ = 23271430.

The previous prime is 23271407. The next prime is 23271433. The reversal of 23271431 is 13417232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23271431 - 2²² = 19077127 is a prime.

It is a super-2 number, since 2×23271431² = 1083119001575522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 23271433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23271397 and 23271406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23271433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11635715 + 11635716.

It is an arithmetic number, because the mean of its divisors is an integer number (11635716).

Almost surely, 2^23271431 is an apocalyptic number.

23271431 is a deficient number, since it is larger than the sum of its proper divisors (1).

23271431 is an equidigital number, since it uses as much as digits as its factorization.

23271431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 23.

The square root of 23271431 is about 4824.0471598026. The cubic root of 23271431 is about 285.5010412763.

Adding to 23271431 its reverse (13417232), we get a palindrome (36688663).

The spelling of 23271431 in words is "twenty-three million, two hundred seventy-one thousand, four hundred thirty-one".