31032313231013 has 2 divisors, whose sum is σ = 31032313231014. Its totient is φ = 31032313231012.

The previous prime is 31032313230983. The next prime is 31032313231057. The reversal of 31032313231013 is 31013231323013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30752093338849 + 280219892164 = 5545457^2 + 529358^2 .

It is a cyclic number.

It is not a de Polignac number, because 31032313231013 - 2¹² = 31032313226917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31032313236013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15516156615506 + 15516156615507.

It is an arithmetic number, because the mean of its divisors is an integer number (15516156615507).

Almost surely, 2^{31032313231013} is an apocalyptic number.

It is an amenable number.

31032313231013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31032313231013 is an equidigital number, since it uses as much as digits as its factorization.

31032313231013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31032313231013 its reverse (31013231323013), we get a palindrome (62045544554026).

It can be divided in two parts, 310 and 32313231013, that added together give a palindrome (32313231323).

The spelling of 31032313231013 in words is "thirty-one trillion, thirty-two billion, three hundred thirteen million, two hundred thirty-one thousand, thirteen".