2208810161 has 4 divisors (see below), whose sum is σ = 2216961024. Its totient is φ = 2200659300.

The previous prime is 2208810137. The next prime is 2208810169. The reversal of 2208810161 is 1610188022.

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 2208810161 - 2²² = 2204615857 is a prime.

It is a super-4 number, since 4×2208810161⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2208810169) 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, 4075025 + ... + 4075566.

It is an arithmetic number, because the mean of its divisors is an integer number (554240256).

Almost surely, 2^2208810161 is an apocalyptic number.

It is an amenable number.

2208810161 is a deficient number, since it is larger than the sum of its proper divisors (8150863).

2208810161 is an equidigital number, since it uses as much as digits as its factorization.

2208810161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8150862.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 2208810161 is about 46997.9803927786. The cubic root of 2208810161 is about 1302.3252587372.

Adding to 2208810161 its reverse (1610188022), we get a palindrome (3818998183).

The spelling of 2208810161 in words is "two billion, two hundred eight million, eight hundred ten thousand, one hundred sixty-one".