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22220 = 22511101
BaseRepresentation
bin101011011001100
31010110222
411123030
51202340
6250512
7121532
oct53314
933428
1022220
1115770
1210a38
13a163
148152
1568b5
hex56cc

22220 has 24 divisors (see below), whose sum is σ = 51408. Its totient is φ = 8000.

The previous prime is 22193. The next prime is 22229. The reversal of 22220 is 2222.

Adding to 22220 its reverse (2222), we get a palindrome (24442).

It can be divided in two parts, 222 and 20, that added together give a palindrome (242).

It is a plaindrome in base 16.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 22198 and 22207.

It is not an unprimeable number, because it can be changed into a prime (22229) by changing a digit.

22220 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 in 7 ways as a sum of consecutive naturals, for example, 170 + ... + 270.

It is an arithmetic number, because the mean of its divisors is an integer number (2142).

222220 is an apocalyptic number.

22220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25704).

22220 is an abundant number, since it is smaller than the sum of its proper divisors (29188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22220 is a wasteful number, since it uses less digits than its factorization.

22220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 22220 is about 149.0637447537. The cubic root of 22220 is about 28.1134849981.

The spelling of 22220 in words is "twenty-two thousand, two hundred twenty", and thus it is an iban number.

Divisors: 1 2 4 5 10 11 20 22 44 55 101 110 202 220 404 505 1010 1111 2020 2222 4444 5555 11110 22220