311232243013 has 2 divisors, whose sum is σ = 311232243014. Its totient is φ = 311232243012.

The previous prime is 311232243001. The next prime is 311232243067. The reversal of 311232243013 is 310342232113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297179800164 + 14052442849 = 545142^2 + 118543^2 .

It is a cyclic number.

It is not a de Polignac number, because 311232243013 - 2²¹ = 311230145861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311232243073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155616121506 + 155616121507.

It is an arithmetic number, because the mean of its divisors is an integer number (155616121507).

Almost surely, 2^311232243013 is an apocalyptic number.

It is an amenable number.

311232243013 is a deficient number, since it is larger than the sum of its proper divisors (1).

311232243013 is an equidigital number, since it uses as much as digits as its factorization.

311232243013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 311232243013 its reverse (310342232113), we get a palindrome (621574475126).

The spelling of 311232243013 in words is "three hundred eleven billion, two hundred thirty-two million, two hundred forty-three thousand, thirteen".