22765 has 8 divisors (see below), whose sum is σ = 28440. Its totient is φ = 17472.
The previous prime is 22751. The next prime is 22769. The reversal of 22765 is 56722.
22765 is nontrivially palindromic in base 12.
It can be written as a sum of positive squares in 4 ways, for example, as 1156 + 21609 = 34^2 + 147^2 .
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 22765 - 27 = 22637 is a prime.
It is a nialpdrome in base 14.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (22769) by changing a digit.
It is a nontrivial repunit in base 28.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67 + ... + 223.
It is an arithmetic number, because the mean of its divisors is an integer number (3555).
222765 is an apocalyptic number.
It is an amenable number.
22765 is a deficient number, since it is larger than the sum of its proper divisors (5675).
22765 is a wasteful number, since it uses less digits than its factorization.
22765 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 191.
The product of its digits is 840, while the sum is 22.
The square root of 22765 is about 150.8807476121. The cubic root of 22765 is about 28.3414817010.
It can be divided in two parts, 227 and 65, that added together give a palindrome (292).
The spelling of 22765 in words is "twenty-two thousand, seven hundred sixty-five".
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