22221307 has 2 divisors, whose sum is σ = 22221308. Its totient is φ = 22221306.

The previous prime is 22221299. The next prime is 22221319. The reversal of 22221307 is 70312222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22221307 - 2³ = 22221299 is a prime.

It is not a weakly prime, because it can be changed into another prime (22221377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110653 + 11110654.

It is an arithmetic number, because the mean of its divisors is an integer number (11110654).

Almost surely, 2^22221307 is an apocalyptic number.

22221307 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221307 is an equidigital number, since it uses as much as digits as its factorization.

22221307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 22221307 is about 4713.9481329349. The cubic root of 22221307 is about 281.1403620727.

Adding to 22221307 its reverse (70312222), we get a palindrome (92533529).

The spelling of 22221307 in words is "twenty-two million, two hundred twenty-one thousand, three hundred seven".