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223220 = 22511161
BaseRepresentation
bin110110011111110100
3102100012102
4312133310
524120340
64441232
71616534
oct663764
9370172
10223220
11142788
12a9218
137a7aa
145b4c4
1546215
hex367f4

223220 has 12 divisors (see below), whose sum is σ = 468804. Its totient is φ = 89280.

The previous prime is 223219. The next prime is 223229. The reversal of 223220 is 22322.

It can be written as a sum of positive squares in 2 ways, for example, as 33124 + 190096 = 182^2 + 436^2 .

It is a super-3 number, since 3×2232203 = 33367261590744000, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5561 + ... + 5600.

It is an arithmetic number, because the mean of its divisors is an integer number (39067).

2223220 is an apocalyptic number.

223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223220 is an abundant number, since it is smaller than the sum of its proper divisors (245584).

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

223220 is a wasteful number, since it uses less digits than its factorization.

223220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11170 (or 11168 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 223220 is about 472.4616386544. The cubic root of 223220 is about 60.6612052135.

Adding to 223220 its reverse (22322), we get a palindrome (245542).

The spelling of 223220 in words is "two hundred twenty-three thousand, two hundred twenty", and thus it is an iban number.

Divisors: 1 2 4 5 10 20 11161 22322 44644 55805 111610 223220