22663321 has 2 divisors, whose sum is σ = 22663322. Its totient is φ = 22663320.

The previous prime is 22663313. The next prime is 22663327. The reversal of 22663321 is 12336622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 2088025 = 4536^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 22663321 - 2³ = 22663313 is a prime.

It is a super-2 number, since 2×22663321² = 1027252237498082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22663327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11331660 + 11331661.

It is an arithmetic number, because the mean of its divisors is an integer number (11331661).

Almost surely, 2^22663321 is an apocalyptic number.

It is an amenable number.

22663321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22663321 is an equidigital number, since it uses as much as digits as its factorization.

22663321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

The square root of 22663321 is about 4760.6009074486. The cubic root of 22663321 is about 282.9922334269.

Adding to 22663321 its reverse (12336622), we get a palindrome (34999943).

The spelling of 22663321 in words is "twenty-two million, six hundred sixty-three thousand, three hundred twenty-one".