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22012 = 225503
BaseRepresentation
bin101010111111100
31010012021
411113330
51201022
6245524
7121114
oct52774
933167
1022012
11155a1
12108a4
13a033
148044
1567c7
hex55fc

22012 has 6 divisors (see below), whose sum is σ = 38528. Its totient is φ = 11004.

The previous prime is 22003. The next prime is 22013. The reversal of 22012 is 21022.

It is a happy number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 21986 and 22004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013) by changing a digit.

22012 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2748 + ... + 2755.

222012 is an apocalyptic number.

It is an amenable number.

22012 is a deficient number, since it is larger than the sum of its proper divisors (16516).

22012 is a wasteful number, since it uses less digits than its factorization.

22012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5507 (or 5505 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 22012 is about 148.3644162190. The cubic root of 22012 is about 28.0254869975.

Adding to 22012 its reverse (21022), we get a palindrome (43034).

Subtracting from 22012 its reverse (21022), we obtain a triangular number (990 = T44).

It can be divided in two parts, 220 and 12, that added together give a palindrome (232).

The spelling of 22012 in words is "twenty-two thousand, twelve", and thus it is an iban number.

Divisors: 1 2 4 5503 11006 22012