22000621 has 2 divisors, whose sum is σ = 22000622. Its totient is φ = 22000620.

The previous prime is 22000619. The next prime is 22000633. The reversal of 22000621 is 12600022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21958596 + 42025 = 4686^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000621 - 2¹ = 22000619 is a prime.

Together with 22000619, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22000661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000310 + 11000311.

It is an arithmetic number, because the mean of its divisors is an integer number (11000311).

Almost surely, 2^22000621 is an apocalyptic number.

It is an amenable number.

22000621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000621 is an equidigital number, since it uses as much as digits as its factorization.

22000621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22000621 is about 4690.4819581787. The cubic root of 22000621 is about 280.2065695050.

Adding to 22000621 its reverse (12600022), we get a palindrome (34600643).

The spelling of 22000621 in words is "twenty-two million, six hundred twenty-one", and thus it is an aban number.