22288855 has 4 divisors (see below), whose sum is σ = 26746632. Its totient is φ = 17831080.

The previous prime is 22288831. The next prime is 22288859. The reversal of 22288855 is 55888222.

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

It is not a de Polignac number, because 22288855 - 2⁷ = 22288727 is a prime.

It is a super-2 number, since 2×22288855² = 993586114422050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22288859) 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, 2228881 + ... + 2228890.

It is an arithmetic number, because the mean of its divisors is an integer number (6686658).

Almost surely, 2^22288855 is an apocalyptic number.

22288855 is a deficient number, since it is larger than the sum of its proper divisors (4457777).

22288855 is an equidigital number, since it uses as much as digits as its factorization.

22288855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457776.

The product of its digits is 102400, while the sum is 40.

The square root of 22288855 is about 4721.1073912801. The cubic root of 22288855 is about 281.4249426825.

The spelling of 22288855 in words is "twenty-two million, two hundred eighty-eight thousand, eight hundred fifty-five".