22440213 has 16 divisors (see below), whose sum is σ = 33317760. Its totient is φ = 14927328.

The previous prime is 22440179. The next prime is 22440239. The reversal of 22440213 is 31204422.

It is not a de Polignac number, because 22440213 - 2⁶ = 22440149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22440293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23481 + ... + 24417.

It is an arithmetic number, because the mean of its divisors is an integer number (2082360).

Almost surely, 2^22440213 is an apocalyptic number.

It is an amenable number.

22440213 is a deficient number, since it is larger than the sum of its proper divisors (10877547).

22440213 is an equidigital number, since it uses as much as digits as its factorization.

22440213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22440213 is about 4737.1101950451. The cubic root of 22440213 is about 282.0605347637.

Adding to 22440213 its reverse (31204422), we get a palindrome (53644635).

The spelling of 22440213 in words is "twenty-two million, four hundred forty thousand, two hundred thirteen".