Search a number
-
+
231205441 is a prime number
BaseRepresentation
bin11011100011111…
…10101001000001
3121010001110020111
431301332221001
5433142033231
634535311321
75505133225
oct1561765101
9533043214
10231205441
11109567085
126551b541
1338b91b6c
14229c6785
15154704b1
hexdc7ea41

231205441 has 2 divisors, whose sum is σ = 231205442. Its totient is φ = 231205440.

The previous prime is 231205411. The next prime is 231205477. The reversal of 231205441 is 144502132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223801600 + 7403841 = 14960^2 + 2721^2 .

It is a cyclic number.

It is not a de Polignac number, because 231205441 - 213 = 231197249 is a prime.

It is not a weakly prime, because it can be changed into another prime (231205411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115602720 + 115602721.

It is an arithmetic number, because the mean of its divisors is an integer number (115602721).

Almost surely, 2231205441 is an apocalyptic number.

It is an amenable number.

231205441 is a deficient number, since it is larger than the sum of its proper divisors (1).

231205441 is an equidigital number, since it uses as much as digits as its factorization.

231205441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 231205441 is about 15205.4411642675. The cubic root of 231205441 is about 613.7610866544.

Adding to 231205441 its reverse (144502132), we get a palindrome (375707573).

It can be divided in two parts, 23120 and 5441, that added together give a 4-th power (28561 = 134).

The spelling of 231205441 in words is "two hundred thirty-one million, two hundred five thousand, four hundred forty-one".