22855 has 8 divisors (see below), whose sum is σ = 31392.
Its totient is φ = 15648.
The previous prime is 22853. The next prime is 22859. The reversal of 22855 is 55822.
22855 = T50 + T51 + ... +
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 22855 - 21 = 22853 is a prime.
It is an Ulam number.
It is a Duffinian number.
22855 is a lucky number.
It is a nialpdrome in base 13.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (22853) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292 + ... + 361.
It is an arithmetic number, because the mean of its divisors is an integer number (3924).
222855 is an apocalyptic number.
22855 is a deficient number, since it is larger than the sum of its proper divisors (8537).
22855 is an equidigital number, since it uses as much as digits as its factorization.
22855 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 665.
The product of its digits is 800, while the sum is 22.
The square root of 22855 is about 151.1787022037.
The cubic root of 22855 is about 28.3787813471.
The spelling of 22855 in words is "twenty-two thousand, eight hundred fifty-five".