2211872165 has 16 divisors (see below), whose sum is σ = 2858996736. Its totient is φ = 1637961600.

The previous prime is 2211872147. The next prime is 2211872171. The reversal of 2211872165 is 5612781122.

It is not a de Polignac number, because 2211872165 - 2¹⁰ = 2211871141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306656 + ... + 313785.

It is an arithmetic number, because the mean of its divisors is an integer number (178687296).

Almost surely, 2^2211872165 is an apocalyptic number.

It is an amenable number.

2211872165 is a deficient number, since it is larger than the sum of its proper divisors (647124571).

2211872165 is a wasteful number, since it uses less digits than its factorization.

2211872165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620500.

The product of its digits is 13440, while the sum is 35.

The square root of 2211872165 is about 47030.5450212944. The cubic root of 2211872165 is about 1302.9267717077.

The spelling of 2211872165 in words is "two billion, two hundred eleven million, eight hundred seventy-two thousand, one hundred sixty-five".