31553253222191 has 2 divisors, whose sum is σ = 31553253222192. Its totient is φ = 31553253222190.

The previous prime is 31553253222137. The next prime is 31553253222203. The reversal of 31553253222191 is 19122235235513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31553253222191 - 2¹⁴ = 31553253205807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31553258222191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15776626611095 + 15776626611096.

It is an arithmetic number, because the mean of its divisors is an integer number (15776626611096).

Almost surely, 2^{31553253222191} is an apocalyptic number.

31553253222191 is a deficient number, since it is larger than the sum of its proper divisors (1).

31553253222191 is an equidigital number, since it uses as much as digits as its factorization.

31553253222191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486000, while the sum is 44.

The spelling of 31553253222191 in words is "thirty-one trillion, five hundred fifty-three billion, two hundred fifty-three million, two hundred twenty-two thousand, one hundred ninety-one".