22331223281 has 2 divisors, whose sum is σ = 22331223282. Its totient is φ = 22331223280.

The previous prime is 22331223263. The next prime is 22331223283. The reversal of 22331223281 is 18232213322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22263325681 + 67897600 = 149209^2 + 8240^2 .

It is a cyclic number.

It is not a de Polignac number, because 22331223281 - 2⁶ = 22331223217 is a prime.

It is a super-2 number, since 2×22331223281² (a number of 21 digits) contains 22 as substring.

Together with 22331223283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22331223283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11165611640 + 11165611641.

It is an arithmetic number, because the mean of its divisors is an integer number (11165611641).

Almost surely, 2^22331223281 is an apocalyptic number.

It is an amenable number.

22331223281 is a deficient number, since it is larger than the sum of its proper divisors (1).

22331223281 is an equidigital number, since it uses as much as digits as its factorization.

22331223281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The spelling of 22331223281 in words is "twenty-two billion, three hundred thirty-one million, two hundred twenty-three thousand, two hundred eighty-one".