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BaseRepresentation
bin110110001101000100
3102021112222
4312031010
524101040
64431512
71613201
oct661504
9367488
10222020
11141897
12a8598
137a096
145aca8
1545bb5
hex36344

222020 has 24 divisors (see below), whose sum is σ = 494424. Its totient is φ = 83456.

The previous prime is 222011. The next prime is 222023. The reversal of 222020 is 20222.

Adding to 222020 its reverse (20222), we get a palindrome (242242).

It can be divided in two parts, 2 and 22020, that added together give a palindrome (22022).

It can be written as a sum of positive squares in 4 ways, for example, as 23104 + 198916 = 152^2 + 446^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 221989 and 222007.

It is not an unprimeable number, because it can be changed into a prime (222023) by changing a digit.

222020 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, 14 + ... + 666.

It is an arithmetic number, because the mean of its divisors is an integer number (20601).

2222020 is an apocalyptic number.

222020 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 222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247212).

222020 is an abundant number, since it is smaller than the sum of its proper divisors (272404).

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

222020 is a wasteful number, since it uses less digits than its factorization.

222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 677 counting only the distinct ones).

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

The square root of 222020 is about 471.1899829156. The cubic root of 222020 is about 60.5523077435.

The spelling of 222020 in words is "two hundred twenty-two thousand, twenty", and thus it is an iban number.