22288505 has 8 divisors (see below), whose sum is σ = 26917512. Its totient is φ = 17716608.

The previous prime is 22288499. The next prime is 22288523. The reversal of 22288505 is 50588222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5707321 + 16581184 = 2389^2 + 4072^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22288505 - 2¹⁴ = 22272121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13412 + ... + 14981.

It is an arithmetic number, because the mean of its divisors is an integer number (3364689).

Almost surely, 2^22288505 is an apocalyptic number.

It is an amenable number.

22288505 is a deficient number, since it is larger than the sum of its proper divisors (4629007).

22288505 is a wasteful number, since it uses less digits than its factorization.

22288505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28555.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 22288505 is about 4721.0703235601. The cubic root of 22288505 is about 281.4234696108.

The spelling of 22288505 in words is "twenty-two million, two hundred eighty-eight thousand, five hundred five".