31222311322243 has 2 divisors, whose sum is σ = 31222311322244. Its totient is φ = 31222311322242.

The previous prime is 31222311322193. The next prime is 31222311322249. The reversal of 31222311322243 is 34222311322213.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31222311322243 is a prime.

It is not a weakly prime, because it can be changed into another prime (31222311322249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611155661121 + 15611155661122.

It is an arithmetic number, because the mean of its divisors is an integer number (15611155661122).

Almost surely, 2^{31222311322243} is an apocalyptic number.

31222311322243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222311322243 is an equidigital number, since it uses as much as digits as its factorization.

31222311322243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 31.

Adding to 31222311322243 its reverse (34222311322213), we get a palindrome (65444622644456).

The spelling of 31222311322243 in words is "thirty-one trillion, two hundred twenty-two billion, three hundred eleven million, three hundred twenty-two thousand, two hundred forty-three".