31282742191 has 2 divisors, whose sum is σ = 31282742192. Its totient is φ = 31282742190.

The previous prime is 31282742177. The next prime is 31282742201. The reversal of 31282742191 is 19124728213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31282742191 - 2⁵ = 31282742159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31282742291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15641371095 + 15641371096.

It is an arithmetic number, because the mean of its divisors is an integer number (15641371096).

Almost surely, 2^31282742191 is an apocalyptic number.

31282742191 is a deficient number, since it is larger than the sum of its proper divisors (1).

31282742191 is an equidigital number, since it uses as much as digits as its factorization.

31282742191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The spelling of 31282742191 in words is "thirty-one billion, two hundred eighty-two million, seven hundred forty-two thousand, one hundred ninety-one".