22140205 has 16 divisors (see below), whose sum is σ = 28821744. Its totient is φ = 16261120.

The previous prime is 22140199. The next prime is 22140221. The reversal of 22140205 is 50204122.

It can be written as a sum of positive squares in 8 ways, for example, as 1108809 + 21031396 = 1053^2 + 4586^2 .

It is not a de Polignac number, because 22140205 - 2²¹ = 20043053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 309 + ... + 6661.

It is an arithmetic number, because the mean of its divisors is an integer number (1801359).

Almost surely, 2^22140205 is an apocalyptic number.

It is an amenable number.

22140205 is a deficient number, since it is larger than the sum of its proper divisors (6681539).

22140205 is a wasteful number, since it uses less digits than its factorization.

22140205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6416.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 22140205 is about 4705.3379262280. The cubic root of 22140205 is about 280.7979153491.

Adding to 22140205 its reverse (50204122), we get a palindrome (72344327).

The spelling of 22140205 in words is "twenty-two million, one hundred forty thousand, two hundred five".