31225452197 has 2 divisors, whose sum is σ = 31225452198. Its totient is φ = 31225452196.

The previous prime is 31225452163. The next prime is 31225452239. The reversal of 31225452197 is 79125452213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24475350916 + 6750101281 = 156446^2 + 82159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31225452197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31225452107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15612726098 + 15612726099.

It is an arithmetic number, because the mean of its divisors is an integer number (15612726099).

Almost surely, 2^31225452197 is an apocalyptic number.

It is an amenable number.

31225452197 is a deficient number, since it is larger than the sum of its proper divisors (1).

31225452197 is an equidigital number, since it uses as much as digits as its factorization.

31225452197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The spelling of 31225452197 in words is "thirty-one billion, two hundred twenty-five million, four hundred fifty-two thousand, one hundred ninety-seven".