265884221 has 4 divisors (see below), whose sum is σ = 272369244. Its totient is φ = 259399200.

The previous prime is 265884211. The next prime is 265884251. The reversal of 265884221 is 122488562.

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 5707321 + 260176900 = 2389^2 + 16130^2 .

It is a cyclic number.

It is not a de Polignac number, because 265884221 - 2¹⁴ = 265867837 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 (265884211) 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, 3242450 + ... + 3242531.

It is an arithmetic number, because the mean of its divisors is an integer number (68092311).

Almost surely, 2^265884221 is an apocalyptic number.

It is an amenable number.

265884221 is a deficient number, since it is larger than the sum of its proper divisors (6485023).

265884221 is an equidigital number, since it uses as much as digits as its factorization.

265884221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6485022.

The product of its digits is 61440, while the sum is 38.

The square root of 265884221 is about 16305.9566110057. The cubic root of 265884221 is about 643.0294371885.

The spelling of 265884221 in words is "two hundred sixty-five million, eight hundred eighty-four thousand, two hundred twenty-one".