2171255265 has 24 divisors (see below), whose sum is σ = 3819686208. Its totient is φ = 1140717600.

The previous prime is 2171255243. The next prime is 2171255291. The reversal of 2171255265 is 5625521712.

2171255265 is a `hidden beast` number, since 2 + 1 + 7 + 125 + 526 + 5 = 666.

It is not a de Polignac number, because 2171255265 - 2⁷ = 2171255137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357061 + ... + 363090.

It is an arithmetic number, because the mean of its divisors is an integer number (159153592).

Almost surely, 2^2171255265 is an apocalyptic number.

It is an amenable number.

2171255265 is a deficient number, since it is larger than the sum of its proper divisors (1648430943).

2171255265 is a wasteful number, since it uses less digits than its factorization.

2171255265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720229 (or 720226 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 2171255265 is about 46596.7301964419. The cubic root of 2171255265 is about 1294.9021785255.

Adding to 2171255265 its reverse (5625521712), we get a palindrome (7796776977).

The spelling of 2171255265 in words is "two billion, one hundred seventy-one million, two hundred fifty-five thousand, two hundred sixty-five".