265333261 has 4 divisors (see below), whose sum is σ = 266319900. Its totient is φ = 264346624.

The previous prime is 265333231. The next prime is 265333273. The reversal of 265333261 is 162333562.

It is a happy number.

265333261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40513225 + 224820036 = 6365^2 + 14994^2 .

It is a cyclic number.

It is not a de Polignac number, because 265333261 - 2¹⁵ = 265300493 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 (265333231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492916 + ... + 493453.

It is an arithmetic number, because the mean of its divisors is an integer number (66579975).

Almost surely, 2^265333261 is an apocalyptic number.

It is an amenable number.

265333261 is a deficient number, since it is larger than the sum of its proper divisors (986639).

265333261 is an equidigital number, since it uses as much as digits as its factorization.

265333261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986638.

The product of its digits is 19440, while the sum is 31.

The square root of 265333261 is about 16289.0534101893. The cubic root of 265333261 is about 642.5849724354.

The spelling of 265333261 in words is "two hundred sixty-five million, three hundred thirty-three thousand, two hundred sixty-one".