31233222997 has 2 divisors, whose sum is σ = 31233222998. Its totient is φ = 31233222996.

The previous prime is 31233222959. The next prime is 31233223027. The reversal of 31233222997 is 79922233213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31121899396 + 111323601 = 176414^2 + 10551^2 .

It is a cyclic number.

It is not a de Polignac number, because 31233222997 - 2¹⁵ = 31233190229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31233222907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616611498 + 15616611499.

It is an arithmetic number, because the mean of its divisors is an integer number (15616611499).

Almost surely, 2^31233222997 is an apocalyptic number.

It is an amenable number.

31233222997 is a deficient number, since it is larger than the sum of its proper divisors (1).

31233222997 is an equidigital number, since it uses as much as digits as its factorization.

31233222997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 43.

The spelling of 31233222997 in words is "thirty-one billion, two hundred thirty-three million, two hundred twenty-two thousand, nine hundred ninety-seven".