31223222143 has 2 divisors, whose sum is σ = 31223222144. Its totient is φ = 31223222142.

The previous prime is 31223222077. The next prime is 31223222171. The reversal of 31223222143 is 34122232213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31223222143 is a prime.

It is a super-2 number, since 2×31223222143² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223220143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611611071 + 15611611072.

It is an arithmetic number, because the mean of its divisors is an integer number (15611611072).

Almost surely, 2^31223222143 is an apocalyptic number.

31223222143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223222143 is an equidigital number, since it uses as much as digits as its factorization.

31223222143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 25.

Adding to 31223222143 its reverse (34122232213), we get a palindrome (65345454356).

The spelling of 31223222143 in words is "thirty-one billion, two hundred twenty-three million, two hundred twenty-two thousand, one hundred forty-three".