2271121164 has 72 divisors (see below), whose sum is σ = 6218455152. Its totient is φ = 694742400.

The previous prime is 2271121123. The next prime is 2271121187. The reversal of 2271121164 is 4611211722.

2271121164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 66939 + ... + 94989.

Almost surely, 2^2271121164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2271121164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3109227576).

2271121164 is an abundant number, since it is smaller than the sum of its proper divisors (3947333988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2271121164 is a wasteful number, since it uses less digits than its factorization.

2271121164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28247 (or 28242 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2271121164 is about 47656.2814747437. The cubic root of 2271121164 is about 1314.4581640063.

Adding to 2271121164 its reverse (4611211722), we get a palindrome (6882332886).

The spelling of 2271121164 in words is "two billion, two hundred seventy-one million, one hundred twenty-one thousand, one hundred sixty-four".