22031 has 2 divisors, whose sum is σ = 22032.
Its totient is φ = 22030.
The previous prime is 22027. The next prime is 22037. The reversal of 22031 is 13022.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 22031 - 22 = 22027 is a prime.
It is a super-2 number, since 2×220312 = 970729922, which contains 22 as substring.
It is a Chen prime.
It is a plaindrome in base 6.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 22031.
It is not a weakly prime, because it can be changed into another prime (22037) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11015 + 11016.
It is an arithmetic number, because the mean of its divisors is an integer number (11016).
222031 is an apocalyptic number.
22031 is a deficient number, since it is larger than the sum of its proper divisors (1).
22031 is an equidigital number, since it uses as much as digits as its factorization.
22031 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 12, while the sum is 8.
The square root of 22031 is about 148.4284339337.
The cubic root of 22031 is about 28.0335482235.
Adding to 22031 its reverse (13022), we get a palindrome (35053).
Subtracting from 22031 its reverse (13022), we obtain a palindrome (9009).
The spelling of 22031 in words is "twenty-two thousand, thirty-one".