22212040 has 16 divisors (see below), whose sum is σ = 49977180. Its totient is φ = 8884800.

The previous prime is 22212019. The next prime is 22212049. The reversal of 22212040 is 4021222.

It can be written as a sum of positive squares in 2 ways, for example, as 19342404 + 2869636 = 4398^2 + 1694^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22212040.

It is not an unprimeable number, because it can be changed into a prime (22212049) 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, 277611 + ... + 277690.

Almost surely, 2^22212040 is an apocalyptic number.

22212040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22212040 is an abundant number, since it is smaller than the sum of its proper divisors (27765140).

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

22212040 is a wasteful number, since it uses less digits than its factorization.

22212040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555312 (or 555308 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22212040 is about 4712.9650964122. The cubic root of 22212040 is about 281.1012751131.

Adding to 22212040 its reverse (4021222), we get a palindrome (26233262).

The spelling of 22212040 in words is "twenty-two million, two hundred twelve thousand, forty".