265350221 has 4 divisors (see below), whose sum is σ = 265841244. Its totient is φ = 264859200.

The previous prime is 265350191. The next prime is 265350227. The reversal of 265350221 is 122053562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122053562 = 2 ⋅61026781.

It can be written as a sum of positive squares in 2 ways, for example, as 99301225 + 166048996 = 9965^2 + 12886^2 .

It is a cyclic number.

It is not a de Polignac number, because 265350221 - 2⁶ = 265350157 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 (265350227) 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, 244700 + ... + 245781.

It is an arithmetic number, because the mean of its divisors is an integer number (66460311).

Almost surely, 2^265350221 is an apocalyptic number.

It is an amenable number.

265350221 is a deficient number, since it is larger than the sum of its proper divisors (491023).

265350221 is an equidigital number, since it uses as much as digits as its factorization.

265350221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491022.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 265350221 is about 16289.5739968852. The cubic root of 265350221 is about 642.5986634051.

The spelling of 265350221 in words is "two hundred sixty-five million, three hundred fifty thousand, two hundred twenty-one".