22231 has 8 divisors (see below), whose sum is σ = 25344.
Its totient is φ = 19320.
The previous prime is 22229. The next prime is 22247. The reversal of 22231 is 13222.
Adding to 22231 its reverse (13222), we get a palindrome (35453).
Subtracting from 22231 its reverse (13222), we obtain a palindrome (9009).
It can be divided in two parts, 222 and 31, that added together give a triangular number (253 = T22).
22231 = T58 + T59 + ... +
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 22231 - 21 = 22229 is a prime.
It is a super-2 number, since 2×222312 = 988434722, which contains 22 as substring.
22231 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (22271) 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, 450 + ... + 496.
It is an arithmetic number, because the mean of its divisors is an integer number (3168).
222231 is an apocalyptic number.
22231 is a deficient number, since it is larger than the sum of its proper divisors (3113).
22231 is a wasteful number, since it uses less digits than its factorization.
22231 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 101.
The product of its digits is 24, while the sum is 10.
The square root of 22231 is about 149.1006371549.
The cubic root of 22231 is about 28.1181234217.
The spelling of 22231 in words is "twenty-two thousand, two hundred thirty-one".