23117431 has 2 divisors, whose sum is σ = 23117432. Its totient is φ = 23117430.

The previous prime is 23117417. The next prime is 23117441. The reversal of 23117431 is 13471132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23117431 - 2¹¹ = 23115383 is a prime.

It is a super-2 number, since 2×23117431² = 1068831232079522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23117401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11558715 + 11558716.

It is an arithmetic number, because the mean of its divisors is an integer number (11558716).

Almost surely, 2^23117431 is an apocalyptic number.

23117431 is a deficient number, since it is larger than the sum of its proper divisors (1).

23117431 is an equidigital number, since it uses as much as digits as its factorization.

23117431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 22.

The square root of 23117431 is about 4808.0589638647. The cubic root of 23117431 is about 284.8698739085.

Adding to 23117431 its reverse (13471132), we get a palindrome (36588563).

The spelling of 23117431 in words is "twenty-three million, one hundred seventeen thousand, four hundred thirty-one".