31222032197 has 2 divisors, whose sum is σ = 31222032198. Its totient is φ = 31222032196.

The previous prime is 31222032109. The next prime is 31222032223. The reversal of 31222032197 is 79123022213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28014055876 + 3207976321 = 167374^2 + 56639^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222032197 - 2²⁰ = 31220983621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31222032697) 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, 15611016098 + 15611016099.

It is an arithmetic number, because the mean of its divisors is an integer number (15611016099).

Almost surely, 2^31222032197 is an apocalyptic number.

It is an amenable number.

31222032197 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222032197 is an equidigital number, since it uses as much as digits as its factorization.

31222032197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 31222032197 in words is "thirty-one billion, two hundred twenty-two million, thirty-two thousand, one hundred ninety-seven".