22088813 has 4 divisors (see below), whose sum is σ = 22216668. Its totient is φ = 21960960.

The previous prime is 22088789. The next prime is 22088839. The reversal of 22088813 is 31888022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14760964 + 7327849 = 3842^2 + 2707^2 .

It is a cyclic number.

It is not a de Polignac number, because 22088813 - 2⁸ = 22088557 is a prime.

It is a super-3 number, since 3×22088813³ (a number of 23 digits) contains 333 as substring.

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 22088813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22088513) 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, 63668 + ... + 64013.

It is an arithmetic number, because the mean of its divisors is an integer number (5554167).

Almost surely, 2^22088813 is an apocalyptic number.

It is an amenable number.

22088813 is a deficient number, since it is larger than the sum of its proper divisors (127855).

22088813 is a wasteful number, since it uses less digits than its factorization.

22088813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127854.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 22088813 is about 4699.8737217079. The cubic root of 22088813 is about 280.5804836604.

The spelling of 22088813 in words is "twenty-two million, eighty-eight thousand, eight hundred thirteen".