31241442091 has 2 divisors, whose sum is σ = 31241442092. Its totient is φ = 31241442090.

The previous prime is 31241442083. The next prime is 31241442097. The reversal of 31241442091 is 19024414213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31241442091 - 2³ = 31241442083 is a prime.

It is not a weakly prime, because it can be changed into another prime (31241442097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620721045 + 15620721046.

It is an arithmetic number, because the mean of its divisors is an integer number (15620721046).

Almost surely, 2^31241442091 is an apocalyptic number.

31241442091 is a deficient number, since it is larger than the sum of its proper divisors (1).

31241442091 is an equidigital number, since it uses as much as digits as its factorization.

31241442091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 31241442091 in words is "thirty-one billion, two hundred forty-one million, four hundred forty-two thousand, ninety-one".