31233331100197 has 2 divisors, whose sum is σ = 31233331100198. Its totient is φ = 31233331100196.

The previous prime is 31233331100141. The next prime is 31233331100243. The reversal of 31233331100197 is 79100113333213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30708067088196 + 525264012001 = 5541486^2 + 724751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31233331100197 is a prime.

It is a super-2 number, since 2×31233331100197² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31233331100107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616665550098 + 15616665550099.

It is an arithmetic number, because the mean of its divisors is an integer number (15616665550099).

Almost surely, 2^{31233331100197} is an apocalyptic number.

It is an amenable number.

31233331100197 is a deficient number, since it is larger than the sum of its proper divisors (1).

31233331100197 is an equidigital number, since it uses as much as digits as its factorization.

31233331100197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 37.

The spelling of 31233331100197 in words is "thirty-one trillion, two hundred thirty-three billion, three hundred thirty-one million, one hundred thousand, one hundred ninety-seven".