31363313 has 2 divisors, whose sum is σ = 31363314. Its totient is φ = 31363312.

The previous prime is 31363291. The next prime is 31363331. The reversal of 31363313 is 31336313.

Together with next prime (31363331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25684624 + 5678689 = 5068^2 + 2383^2 .

It is an emirp because it is prime and its reverse (31336313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31363313 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31363363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15681656 + 15681657.

It is an arithmetic number, because the mean of its divisors is an integer number (15681657).

Almost surely, 2^31363313 is an apocalyptic number.

It is an amenable number.

31363313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31363313 is an equidigital number, since it uses as much as digits as its factorization.

31363313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 23.

The square root of 31363313 is about 5600.2957957594. The cubic root of 31363313 is about 315.3605110714.

Adding to 31363313 its reverse (31336313), we get a palindrome (62699626).

Subtracting from 31363313 its reverse (31336313), we obtain a cube (27000 = 30³).

The spelling of 31363313 in words is "thirty-one million, three hundred sixty-three thousand, three hundred thirteen".