2211621265 has 16 divisors (see below), whose sum is σ = 3040663680. Its totient is φ = 1512748800.

The previous prime is 2211621263. The next prime is 2211621271. The reversal of 2211621265 is 5621261122.

It is not a de Polignac number, because 2211621265 - 2¹ = 2211621263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2211621263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64755 + ... + 92824.

It is an arithmetic number, because the mean of its divisors is an integer number (190041480).

Almost surely, 2^2211621265 is an apocalyptic number.

It is an amenable number.

2211621265 is a deficient number, since it is larger than the sum of its proper divisors (829042415).

2211621265 is a wasteful number, since it uses less digits than its factorization.

2211621265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157992.

The product of its digits is 2880, while the sum is 28.

The square root of 2211621265 is about 47027.8775302479. The cubic root of 2211621265 is about 1302.8775047423.

Adding to 2211621265 its reverse (5621261122), we get a palindrome (7832882387).

The spelling of 2211621265 in words is "two billion, two hundred eleven million, six hundred twenty-one thousand, two hundred sixty-five".