311242402213 has 2 divisors, whose sum is σ = 311242402214. Its totient is φ = 311242402212.

The previous prime is 311242402199. The next prime is 311242402253. The reversal of 311242402213 is 312204242113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244780531009 + 66461871204 = 494753^2 + 257802^2 .

It is a cyclic number.

It is not a de Polignac number, because 311242402213 - 2¹⁷ = 311242271141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311242402253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155621201106 + 155621201107.

It is an arithmetic number, because the mean of its divisors is an integer number (155621201107).

Almost surely, 2^311242402213 is an apocalyptic number.

It is an amenable number.

311242402213 is a deficient number, since it is larger than the sum of its proper divisors (1).

311242402213 is an equidigital number, since it uses as much as digits as its factorization.

311242402213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 311242402213 its reverse (312204242113), we get a palindrome (623446644326).

The spelling of 311242402213 in words is "three hundred eleven billion, two hundred forty-two million, four hundred two thousand, two hundred thirteen".