31012243313 has 2 divisors, whose sum is σ = 31012243314. Its totient is φ = 31012243312.

The previous prime is 31012243193. The next prime is 31012243321. The reversal of 31012243313 is 31334221013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17673841249 + 13338402064 = 132943^2 + 115492^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012243313 - 2¹⁴ = 31012226929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31012243363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506121656 + 15506121657.

It is an arithmetic number, because the mean of its divisors is an integer number (15506121657).

Almost surely, 2^31012243313 is an apocalyptic number.

It is an amenable number.

31012243313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012243313 is an equidigital number, since it uses as much as digits as its factorization.

31012243313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31012243313 its reverse (31334221013), we get a palindrome (62346464326).

The spelling of 31012243313 in words is "thirty-one billion, twelve million, two hundred forty-three thousand, three hundred thirteen".