22238641 has 4 divisors (see below), whose sum is σ = 22658292. Its totient is φ = 21818992.

The previous prime is 22238639. The next prime is 22238663. The reversal of 22238641 is 14683222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6864400 + 15374241 = 2620^2 + 3921^2 .

It is a cyclic number.

It is not a de Polignac number, because 22238641 - 2¹ = 22238639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22238681) 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 in 3 ways as a sum of consecutive naturals, for example, 209746 + ... + 209851.

It is an arithmetic number, because the mean of its divisors is an integer number (5664573).

Almost surely, 2^22238641 is an apocalyptic number.

It is an amenable number.

22238641 is a deficient number, since it is larger than the sum of its proper divisors (419651).

22238641 is an equidigital number, since it uses as much as digits as its factorization.

22238641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419650.

The product of its digits is 4608, while the sum is 28.

The square root of 22238641 is about 4715.7863607250. The cubic root of 22238641 is about 281.2134453890.

The spelling of 22238641 in words is "twenty-two million, two hundred thirty-eight thousand, six hundred forty-one".