23131032191 has 2 divisors, whose sum is σ = 23131032192. Its totient is φ = 23131032190.

The previous prime is 23131032181. The next prime is 23131032227. The reversal of 23131032191 is 19123013132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23131032191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23131032191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23131032161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565516095 + 11565516096.

It is an arithmetic number, because the mean of its divisors is an integer number (11565516096).

Almost surely, 2^23131032191 is an apocalyptic number.

23131032191 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131032191 is an equidigital number, since it uses as much as digits as its factorization.

23131032191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 23131032191 in words is "twenty-three billion, one hundred thirty-one million, thirty-two thousand, one hundred ninety-one".