31213103297 has 2 divisors, whose sum is σ = 31213103298. Its totient is φ = 31213103296.

The previous prime is 31213103287. The next prime is 31213103371. The reversal of 31213103297 is 79230131213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16320318001 + 14892785296 = 127751^2 + 122036^2 .

It is a cyclic number.

It is not a de Polignac number, because 31213103297 - 2⁸ = 31213103041 is a prime.

It is not a weakly prime, because it can be changed into another prime (31213103287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606551648 + 15606551649.

It is an arithmetic number, because the mean of its divisors is an integer number (15606551649).

Almost surely, 2^31213103297 is an apocalyptic number.

It is an amenable number.

31213103297 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213103297 is an equidigital number, since it uses as much as digits as its factorization.

31213103297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The spelling of 31213103297 in words is "thirty-one billion, two hundred thirteen million, one hundred three thousand, two hundred ninety-seven".