265521345 has 32 divisors (see below), whose sum is σ = 436998144. Its totient is φ = 137592000.

The previous prime is 265521341. The next prime is 265521359. The reversal of 265521345 is 543125562.

265521345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 265521345 - 2² = 265521341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (265521341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135120 + ... + 137070.

It is an arithmetic number, because the mean of its divisors is an integer number (13656192).

Almost surely, 2^265521345 is an apocalyptic number.

It is an amenable number.

265521345 is a deficient number, since it is larger than the sum of its proper divisors (171476799).

265521345 is a wasteful number, since it uses less digits than its factorization.

265521345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213.

The product of its digits is 36000, while the sum is 33.

The square root of 265521345 is about 16294.8257124770. The cubic root of 265521345 is about 642.7367707250.

The spelling of 265521345 in words is "two hundred sixty-five million, five hundred twenty-one thousand, three hundred forty-five".