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22556 = 225639
BaseRepresentation
bin101100000011100
31010221102
411200130
51210211
6252232
7122522
oct54034
933842
1022556
1115a46
1211078
13a361
148312
156a3b
hex581c

22556 has 6 divisors (see below), whose sum is σ = 39480. Its totient is φ = 11276.

The previous prime is 22549. The next prime is 22567. The reversal of 22556 is 65522.

It is a happy number.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

22556 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, 2816 + ... + 2823.

It is an arithmetic number, because the mean of its divisors is an integer number (6580).

222556 is an apocalyptic number.

It is an amenable number.

22556 is a deficient number, since it is larger than the sum of its proper divisors (16924).

22556 is a wasteful number, since it uses less digits than its factorization.

22556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643 (or 5641 counting only the distinct ones).

The product of its digits is 600, while the sum is 20.

The square root of 22556 is about 150.1865506628. The cubic root of 22556 is about 28.2544828034.

It can be divided in two parts, 2255 and 6, that multiplied together give a triangular number (13530 = T164).

The spelling of 22556 in words is "twenty-two thousand, five hundred fifty-six".

Divisors: 1 2 4 5639 11278 22556