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BaseRepresentation
bin111100111110110
31120211101
413213312
51444342
6400314
7160012
oct74766
946741
1031222
1121504
121609a
1311299
14b542
1593b7
hex79f6

31222 has 8 divisors (see below), whose sum is σ = 47736. Its totient is φ = 15312.

The previous prime is 31219. The next prime is 31223. The reversal of 31222 is 22213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 13.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 31199 and 31208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18 + ... + 250.

It is an arithmetic number, because the mean of its divisors is an integer number (5967).

231222 is an apocalyptic number.

31222 is a deficient number, since it is larger than the sum of its proper divisors (16514).

31222 is a wasteful number, since it uses less digits than its factorization.

31222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302.

The product of its digits is 24, while the sum is 10.

The square root of 31222 is about 176.6974815893. The cubic root of 31222 is about 31.4886160258.

Adding to 31222 its reverse (22213), we get a palindrome (53435).

Subtracting from 31222 its reverse (22213), we obtain a palindrome (9009).

It can be divided in two parts, 31 and 222, that added together give a triangular number (253 = T22).

The spelling of 31222 in words is "thirty-one thousand, two hundred twenty-two".

Divisors: 1 2 67 134 233 466 15611 31222