2161072056 has 64 divisors (see below), whose sum is σ = 6347214720. Its totient is φ = 604494720.

The previous prime is 2161072049. The next prime is 2161072057. The reversal of 2161072056 is 6502701612.

2161072056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161072057) 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, 311410 + ... + 318273.

It is an arithmetic number, because the mean of its divisors is an integer number (99175230).

Almost surely, 2^2161072056 is an apocalyptic number.

2161072056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2161072056 is an abundant number, since it is smaller than the sum of its proper divisors (4186142664).

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

2161072056 is a wasteful number, since it uses less digits than its factorization.

2161072056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629716 (or 629712 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 2161072056 is about 46487.3322099688. The cubic root of 2161072056 is about 1292.8746374105.

Adding to 2161072056 its reverse (6502701612), we get a palindrome (8663773668).

The spelling of 2161072056 in words is "two billion, one hundred sixty-one million, seventy-two thousand, fifty-six".