31222032223 has 2 divisors, whose sum is σ = 31222032224. Its totient is φ = 31222032222.

The previous prime is 31222032197. The next prime is 31222032251. The reversal of 31222032223 is 32223022213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31222032223 is a prime.

It is a super-2 number, since 2×31222032223² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31222032194 and 31222032203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31222032263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611016111 + 15611016112.

It is an arithmetic number, because the mean of its divisors is an integer number (15611016112).

Almost surely, 2^31222032223 is an apocalyptic number.

31222032223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222032223 is an equidigital number, since it uses as much as digits as its factorization.

31222032223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 31222032223 its reverse (32223022213), we get a palindrome (63445054436).

It can be divided in two parts, 312220 and 32223, that added together give a palindrome (344443).

The spelling of 31222032223 in words is "thirty-one billion, two hundred twenty-two million, thirty-two thousand, two hundred twenty-three".