22540817 has 4 divisors (see below), whose sum is σ = 24274740. Its totient is φ = 20806896.

The previous prime is 22540811. The next prime is 22540823. The reversal of 22540817 is 71804522.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22540811) and next prime (22540823).

It can be written as a sum of positive squares in 2 ways, for example, as 12453841 + 10086976 = 3529^2 + 3176^2 .

It is a cyclic number.

It is not a de Polignac number, because 22540817 - 2⁸ = 22540561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22540817.

It is not an unprimeable number, because it can be changed into a prime (22540811) 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, 866942 + ... + 866967.

It is an arithmetic number, because the mean of its divisors is an integer number (6068685).

Almost surely, 2^22540817 is an apocalyptic number.

It is an amenable number.

22540817 is a deficient number, since it is larger than the sum of its proper divisors (1733923).

22540817 is a wasteful number, since it uses less digits than its factorization.

22540817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733922.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 22540817 is about 4747.7170303210. The cubic root of 22540817 is about 282.4814178395.

The spelling of 22540817 in words is "twenty-two million, five hundred forty thousand, eight hundred seventeen".