22216340 has 12 divisors (see below), whose sum is σ = 46654356. Its totient is φ = 8886528.

The previous prime is 22216333. The next prime is 22216351. The reversal of 22216340 is 4361222.

It can be written as a sum of positive squares in 2 ways, for example, as 6990736 + 15225604 = 2644^2 + 3902^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1110817 = 22216340 / (2 + 2 + 2 + 1 + 6 + 3 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555389 + ... + 555428.

It is an arithmetic number, because the mean of its divisors is an integer number (3887863).

Almost surely, 2^22216340 is an apocalyptic number.

22216340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22216340 is an abundant number, since it is smaller than the sum of its proper divisors (24438016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22216340 is a wasteful number, since it uses less digits than its factorization.

22216340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110826 (or 1110824 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 22216340 is about 4713.4212627347. The cubic root of 22216340 is about 281.1194132864.

Adding to 22216340 its reverse (4361222), we get a palindrome (26577562).

The spelling of 22216340 in words is "twenty-two million, two hundred sixteen thousand, three hundred forty".