22216641 has 4 divisors (see below), whose sum is σ = 29622192. Its totient is φ = 14811092.

The previous prime is 22216619. The next prime is 22216657. The reversal of 22216641 is 14661222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22216641 - 2⁵ = 22216609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22216661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3702771 + ... + 3702776.

It is an arithmetic number, because the mean of its divisors is an integer number (7405548).

Almost surely, 2^22216641 is an apocalyptic number.

It is an amenable number.

22216641 is a deficient number, since it is larger than the sum of its proper divisors (7405551).

22216641 is an equidigital number, since it uses as much as digits as its factorization.

22216641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7405550.

The product of its digits is 1152, while the sum is 24.

The square root of 22216641 is about 4713.4531927240. The cubic root of 22216641 is about 281.1206828708.

Adding to 22216641 its reverse (14661222), we get a palindrome (36877863).

The spelling of 22216641 in words is "twenty-two million, two hundred sixteen thousand, six hundred forty-one".