22273816321 has 2 divisors, whose sum is σ = 22273816322. Its totient is φ = 22273816320.

The previous prime is 22273816319. The next prime is 22273816363. The reversal of 22273816321 is 12361837222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12867726096 + 9406090225 = 113436^2 + 96985^2 .

It is a cyclic number.

It is not a de Polignac number, because 22273816321 - 2¹ = 22273816319 is a prime.

It is a super-3 number, since 3×22273816321³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 22273816319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22273816021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11136908160 + 11136908161.

It is an arithmetic number, because the mean of its divisors is an integer number (11136908161).

Almost surely, 2^22273816321 is an apocalyptic number.

It is an amenable number.

22273816321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22273816321 is an equidigital number, since it uses as much as digits as its factorization.

22273816321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The spelling of 22273816321 in words is "twenty-two billion, two hundred seventy-three million, eight hundred sixteen thousand, three hundred twenty-one".