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231133 = 725389
BaseRepresentation
bin111000011011011101
3102202001111
4320123131
524344013
64542021
71651600
oct703335
9382044
10231133
11148721
12b1911
1381286
1460337
154873d
hex386dd

231133 has 12 divisors (see below), whose sum is σ = 277020. Its totient is φ = 192192.

The previous prime is 231131. The next prime is 231169. The reversal of 231133 is 331132.

It can be written as a sum of positive squares in 2 ways, for example, as 103684 + 127449 = 322^2 + 357^2 .

It is not a de Polignac number, because 231133 - 21 = 231131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2553 + ... + 2641.

It is an arithmetic number, because the mean of its divisors is an integer number (23085).

2231133 is an apocalyptic number.

It is an amenable number.

231133 is a deficient number, since it is larger than the sum of its proper divisors (45887).

231133 is an equidigital number, since it uses as much as digits as its factorization.

231133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 149 counting only the distinct ones).

The product of its digits is 54, while the sum is 13.

The square root of 231133 is about 480.7629353434. The cubic root of 231133 is about 61.3696979006.

Adding to 231133 its reverse (331132), we get a palindrome (562265).

Subtracting 231133 from its reverse (331132), we obtain a palindrome (99999).

It can be divided in two parts, 23 and 1133, that added together give a square (1156 = 342).

The spelling of 231133 in words is "two hundred thirty-one thousand, one hundred thirty-three".

Divisors: 1 7 49 53 89 371 623 2597 4361 4717 33019 231133