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223231 = 1931379
BaseRepresentation
bin110110011111111111
3102100012211
4312133333
524120411
64441251
71616551
oct663777
9370184
10223231
11142798
12a9227
137a7b8
145b4d1
1546221
hex367ff

223231 has 8 divisors (see below), whose sum is σ = 243200. Its totient is φ = 204120.

The previous prime is 223229. The next prime is 223241. The reversal of 223231 is 132322.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 6-Lehmer number, since φ(223231) divides (223231-1)6.

It is a cyclic number.

It is not a de Polignac number, because 223231 - 21 = 223229 is a prime.

It is a super-3 number, since 3×2232313 = 33372194723506173, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400 + ... + 778.

It is an arithmetic number, because the mean of its divisors is an integer number (30400).

2223231 is an apocalyptic number.

223231 is a deficient number, since it is larger than the sum of its proper divisors (19969).

223231 is a wasteful number, since it uses less digits than its factorization.

223231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429.

The product of its digits is 72, while the sum is 13.

The square root of 223231 is about 472.4732796678. The cubic root of 223231 is about 60.6622016330.

Adding to 223231 its reverse (132322), we get a palindrome (355553).

Subtracting from 223231 its reverse (132322), we obtain a palindrome (90909).

It can be divided in two parts, 223 and 231, that added together give a palindrome (454).

The spelling of 223231 in words is "two hundred twenty-three thousand, two hundred thirty-one".

Divisors: 1 19 31 379 589 7201 11749 223231