31240401201313 has 2 divisors, whose sum is σ = 31240401201314. Its totient is φ = 31240401201312.

The previous prime is 31240401201307. The next prime is 31240401201343. The reversal of 31240401201313 is 31310210404213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30722709439249 + 517691762064 = 5542807^2 + 719508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31240401201313 is a prime.

It is not a weakly prime, because it can be changed into another prime (31240401201343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620200600656 + 15620200600657.

It is an arithmetic number, because the mean of its divisors is an integer number (15620200600657).

Almost surely, 2^{31240401201313} is an apocalyptic number.

It is an amenable number.

31240401201313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240401201313 is an equidigital number, since it uses as much as digits as its factorization.

31240401201313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31240401201313 its reverse (31310210404213), we get a palindrome (62550611605526).

The spelling of 31240401201313 in words is "thirty-one trillion, two hundred forty billion, four hundred one million, two hundred one thousand, three hundred thirteen".