2208995161 has 4 divisors (see below), whose sum is σ = 2209984000. Its totient is φ = 2208006324.

The previous prime is 2208995149. The next prime is 2208995167. The reversal of 2208995161 is 1615998022.

2208995161 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2208995161 - 2⁹ = 2208994649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2208995167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491061 + ... + 495538.

It is an arithmetic number, because the mean of its divisors is an integer number (552496000).

Almost surely, 2^2208995161 is an apocalyptic number.

It is an amenable number.

2208995161 is a deficient number, since it is larger than the sum of its proper divisors (988839).

2208995161 is an equidigital number, since it uses as much as digits as its factorization.

2208995161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988838.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 2208995161 is about 46999.9485212484. The cubic root of 2208995161 is about 1302.3616166900.

The spelling of 2208995161 in words is "two billion, two hundred eight million, nine hundred ninety-five thousand, one hundred sixty-one".