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223569 = 3224841
BaseRepresentation
bin110110100101010001
3102100200100
4312211101
524123234
64443013
71620543
oct664521
9370610
10223569
11142a75
12a9469
137a9b8
145b693
1546399
hex36951

223569 has 6 divisors (see below), whose sum is σ = 322946. Its totient is φ = 149040.

The previous prime is 223549. The next prime is 223577. The reversal of 223569 is 965322.

223569 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 140625 + 82944 = 375^2 + 288^2 .

It is not a de Polignac number, because 223569 - 27 = 223441 is a prime.

It is a super-2 number, since 2×2235692 = 99966195522, which contains 22 as substring.

It is a d-powerful number, because it can be written as 25 + 217 + 57 + 3 + 65 + 94 .

It is a Duffinian number.

223569 is strictly pandigital in base 7.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (223529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12412 + ... + 12429.

2223569 is an apocalyptic number.

It is an amenable number.

223569 is a deficient number, since it is larger than the sum of its proper divisors (99377).

223569 is a wasteful number, since it uses less digits than its factorization.

223569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24847 (or 24844 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 223569 is about 472.8308365579. The cubic root of 223569 is about 60.6928029450.

It can be divided in two parts, 2235 and 69, that added together give a square (2304 = 482).

The spelling of 223569 in words is "two hundred twenty-three thousand, five hundred sixty-nine".

Divisors: 1 3 9 24841 74523 223569