23147431 has 2 divisors, whose sum is σ = 23147432. Its totient is φ = 23147430.

The previous prime is 23147429. The next prime is 23147437. The reversal of 23147431 is 13474132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23147431 - 2¹ = 23147429 is a prime.

It is a super-2 number, since 2×23147431² = 1071607123799522, which contains 22 as substring.

Together with 23147429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 23147396 and 23147405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23147437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11573715 + 11573716.

It is an arithmetic number, because the mean of its divisors is an integer number (11573716).

Almost surely, 2^23147431 is an apocalyptic number.

23147431 is a deficient number, since it is larger than the sum of its proper divisors (1).

23147431 is an equidigital number, since it uses as much as digits as its factorization.

23147431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 23147431 is about 4811.1777144479. The cubic root of 23147431 is about 284.9930479478.

The spelling of 23147431 in words is "twenty-three million, one hundred forty-seven thousand, four hundred thirty-one".