23008531591 has 2 divisors, whose sum is σ = 23008531592. Its totient is φ = 23008531590.

The previous prime is 23008531541. The next prime is 23008531621. The reversal of 23008531591 is 19513580032.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23008531591 - 2⁷ = 23008531463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23008531591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23008531541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11504265795 + 11504265796.

It is an arithmetic number, because the mean of its divisors is an integer number (11504265796).

Almost surely, 2^23008531591 is an apocalyptic number.

23008531591 is a deficient number, since it is larger than the sum of its proper divisors (1).

23008531591 is an equidigital number, since it uses as much as digits as its factorization.

23008531591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 23008531591 in words is "twenty-three billion, eight million, five hundred thirty-one thousand, five hundred ninety-one".