23231491 has 2 divisors, whose sum is σ = 23231492. Its totient is φ = 23231490.

The previous prime is 23231479. The next prime is 23231539. The reversal of 23231491 is 19413232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23231491 - 2⁹ = 23230979 is a prime.

It is not a weakly prime, because it can be changed into another prime (23231591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11615745 + 11615746.

It is an arithmetic number, because the mean of its divisors is an integer number (11615746).

Almost surely, 2^23231491 is an apocalyptic number.

23231491 is a deficient number, since it is larger than the sum of its proper divisors (1).

23231491 is an equidigital number, since it uses as much as digits as its factorization.

23231491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 23231491 is about 4819.9057044718. The cubic root of 23231491 is about 285.3376156967.

The spelling of 23231491 in words is "twenty-three million, two hundred thirty-one thousand, four hundred ninety-one".