312442522321 has 2 divisors, whose sum is σ = 312442522322. Its totient is φ = 312442522320.

The previous prime is 312442522319. The next prime is 312442522373. The reversal of 312442522321 is 123225244213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201543532096 + 110898990225 = 448936^2 + 333015^2 .

It is an emirp because it is prime and its reverse (123225244213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312442522321 - 2¹ = 312442522319 is a prime.

Together with 312442522319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (312442522391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156221261160 + 156221261161.

It is an arithmetic number, because the mean of its divisors is an integer number (156221261161).

Almost surely, 2^312442522321 is an apocalyptic number.

It is an amenable number.

312442522321 is a deficient number, since it is larger than the sum of its proper divisors (1).

312442522321 is an equidigital number, since it uses as much as digits as its factorization.

312442522321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 31.

Adding to 312442522321 its reverse (123225244213), we get a palindrome (435667766534).

The spelling of 312442522321 in words is "three hundred twelve billion, four hundred forty-two million, five hundred twenty-two thousand, three hundred twenty-one".