265525221 has 32 divisors (see below), whose sum is σ = 389390848. Its totient is φ = 159952320.

The previous prime is 265525219. The next prime is 265525229. The reversal of 265525221 is 122525562.

It is not a de Polignac number, because 265525221 - 2¹ = 265525219 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 (265525229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 802026 + ... + 802356.

It is an arithmetic number, because the mean of its divisors is an integer number (12168464).

Almost surely, 2^265525221 is an apocalyptic number.

It is an amenable number.

265525221 is a deficient number, since it is larger than the sum of its proper divisors (123865627).

265525221 is a wasteful number, since it uses less digits than its factorization.

265525221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721.

The product of its digits is 12000, while the sum is 30.

The square root of 265525221 is about 16294.9446455028. The cubic root of 265525221 is about 642.7398982019.

The spelling of 265525221 in words is "two hundred sixty-five million, five hundred twenty-five thousand, two hundred twenty-one".