22040213 has 4 divisors (see below), whose sum is σ = 23735628. Its totient is φ = 20344800.

The previous prime is 22040191. The next prime is 22040219. The reversal of 22040213 is 31204022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31204022 = 2 ⋅15602011.

It can be written as a sum of positive squares in 2 ways, for example, as 1036324 + 21003889 = 1018^2 + 4583^2 .

It is a cyclic number.

It is not a de Polignac number, because 22040213 - 2¹² = 22036117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22040219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847688 + ... + 847713.

It is an arithmetic number, because the mean of its divisors is an integer number (5933907).

Almost surely, 2^22040213 is an apocalyptic number.

It is an amenable number.

22040213 is a deficient number, since it is larger than the sum of its proper divisors (1695415).

22040213 is a wasteful number, since it uses less digits than its factorization.

22040213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695414.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22040213 is about 4694.7005229301. The cubic root of 22040213 is about 280.3745540105.

Adding to 22040213 its reverse (31204022), we get a palindrome (53244235).

The spelling of 22040213 in words is "twenty-two million, forty thousand, two hundred thirteen".