2161115056 has 40 divisors (see below), whose sum is σ = 4241563344. Its totient is φ = 1066598400.

The previous prime is 2161115041. The next prime is 2161115057. The reversal of 2161115056 is 6505111612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2161115057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462331 + ... + 466981.

Almost surely, 2^2161115056 is an apocalyptic number.

It is an amenable number.

2161115056 is a deficient number, since it is larger than the sum of its proper divisors (2080448288).

2161115056 is a wasteful number, since it uses less digits than its factorization.

2161115056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029 (or 5023 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 2161115056 is about 46487.7946992541. The cubic root of 2161115056 is about 1292.8832123584.

Adding to 2161115056 its reverse (6505111612), we get a palindrome (8666226668).

The spelling of 2161115056 in words is "two billion, one hundred sixty-one million, one hundred fifteen thousand, fifty-six".