23091205531 has 2 divisors, whose sum is σ = 23091205532. Its totient is φ = 23091205530.

The previous prime is 23091205517. The next prime is 23091205547. The reversal of 23091205531 is 13550219032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23091205531 - 2⁵ = 23091205499 is a prime.

It is a super-2 number, since 2×23091205531² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23091205493 and 23091205502.

It is not a weakly prime, because it can be changed into another prime (23091205031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11545602765 + 11545602766.

It is an arithmetic number, because the mean of its divisors is an integer number (11545602766).

Almost surely, 2^23091205531 is an apocalyptic number.

23091205531 is a deficient number, since it is larger than the sum of its proper divisors (1).

23091205531 is an equidigital number, since it uses as much as digits as its factorization.

23091205531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 23091205531 in words is "twenty-three billion, ninety-one million, two hundred five thousand, five hundred thirty-one".