2161600055 has 4 divisors (see below), whose sum is σ = 2593920072. Its totient is φ = 1729280040.

The previous prime is 2161600027. The next prime is 2161600061. The reversal of 2161600055 is 5500061612.

2161600055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-2161600055 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2161599997 and 2161600033.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216160001 + ... + 216160010.

It is an arithmetic number, because the mean of its divisors is an integer number (648480018).

Almost surely, 2^2161600055 is an apocalyptic number.

2161600055 is a deficient number, since it is larger than the sum of its proper divisors (432320017).

2161600055 is an equidigital number, since it uses as much as digits as its factorization.

2161600055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432320016.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2161600055 is about 46493.0108188317. The cubic root of 2161600055 is about 1292.9799217187.

Adding to 2161600055 its reverse (5500061612), we get a palindrome (7661661667).

The spelling of 2161600055 in words is "two billion, one hundred sixty-one million, six hundred thousand, fifty-five".