31241317 has 2 divisors, whose sum is σ = 31241318. Its totient is φ = 31241316.

The previous prime is 31241281. The next prime is 31241351. The reversal of 31241317 is 71314213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30813601 + 427716 = 5551^2 + 654^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31241317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31241387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620658 + 15620659.

It is an arithmetic number, because the mean of its divisors is an integer number (15620659).

Almost surely, 2^31241317 is an apocalyptic number.

It is an amenable number.

31241317 is a deficient number, since it is larger than the sum of its proper divisors (1).

31241317 is an equidigital number, since it uses as much as digits as its factorization.

31241317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 22.

The square root of 31241317 is about 5589.3932586641. The cubic root of 31241317 is about 314.9510867194.

The spelling of 31241317 in words is "thirty-one million, two hundred forty-one thousand, three hundred seventeen".