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265231 is a prime number
BaseRepresentation
bin1000000110000001111
3111110211101
41000300033
531441411
65403531
72153161
oct1006017
9443741
10265231
111712aa
121095a7
1393955
146c931
15538c1
hex40c0f

265231 has 2 divisors, whose sum is σ = 265232. Its totient is φ = 265230.

The previous prime is 265207. The next prime is 265241. The reversal of 265231 is 132562.

265231 = T419 + T420 + T421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265231 - 211 = 263183 is a prime.

It is a super-2 number, since 2×2652312 = 140694966722, which contains 22 as substring.

It is a Chen prime.

It is equal to p23248 and since 265231 and 23248 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 265199 and 265208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132615 + 132616.

It is an arithmetic number, because the mean of its divisors is an integer number (132616).

265231 is a Friedman number, since it can be written as 6+(512+3)^2, using all its digits and the basic arithmetic operations.

2265231 is an apocalyptic number.

265231 is the 421-st centered triangular number.

265231 is a deficient number, since it is larger than the sum of its proper divisors (1).

265231 is an equidigital number, since it uses as much as digits as its factorization.

265231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 19.

The square root of 265231 is about 515.0058252098. The cubic root of 265231 is about 64.2502409818.

Adding to 265231 its reverse (132562), we get a palindrome (397793).

It can be divided in two parts, 265 and 231, that added together give a triangular number (496 = T31).

The spelling of 265231 in words is "two hundred sixty-five thousand, two hundred thirty-one".