3031231397 has 2 divisors, whose sum is σ = 3031231398. Its totient is φ = 3031231396.

The previous prime is 3031231391. The next prime is 3031231447. The reversal of 3031231397 is 7931321303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3011924161 + 19307236 = 54881^2 + 4394^2 .

It is a cyclic number.

It is not a de Polignac number, because 3031231397 - 2²⁸ = 2762795941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3031231391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515615698 + 1515615699.

It is an arithmetic number, because the mean of its divisors is an integer number (1515615699).

Almost surely, 2^3031231397 is an apocalyptic number.

It is an amenable number.

3031231397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3031231397 is an equidigital number, since it uses as much as digits as its factorization.

3031231397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 32.

The square root of 3031231397 is about 55056.6199198607. The cubic root of 3031231397 is about 1447.2371324039.

The spelling of 3031231397 in words is "three billion, thirty-one million, two hundred thirty-one thousand, three hundred ninety-seven".