22235021 has 2 divisors, whose sum is σ = 22235022. Its totient is φ = 22235020.

The previous prime is 22235011. The next prime is 22235041. The reversal of 22235021 is 12053222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22221796 + 13225 = 4714^2 + 115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22235021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22235011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11117510 + 11117511.

It is an arithmetic number, because the mean of its divisors is an integer number (11117511).

Almost surely, 2^22235021 is an apocalyptic number.

It is an amenable number.

22235021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22235021 is an equidigital number, since it uses as much as digits as its factorization.

22235021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22235021 is about 4715.4025278867. The cubic root of 22235021 is about 281.1981859447.

Adding to 22235021 its reverse (12053222), we get a palindrome (34288243).

The spelling of 22235021 in words is "twenty-two million, two hundred thirty-five thousand, twenty-one".