2161066313 has 4 divisors (see below), whose sum is σ = 2469790080. Its totient is φ = 1852342548.

The previous prime is 2161066309. The next prime is 2161066319. The reversal of 2161066313 is 3136601612.

It is a happy number.

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 not a de Polignac number, because 2161066313 - 2² = 2161066309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161066319) 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, 154361873 + ... + 154361886.

It is an arithmetic number, because the mean of its divisors is an integer number (617447520).

Almost surely, 2^2161066313 is an apocalyptic number.

It is an amenable number.

2161066313 is a deficient number, since it is larger than the sum of its proper divisors (308723767).

2161066313 is an equidigital number, since it uses as much as digits as its factorization.

2161066313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308723766.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 2161066313 is about 46487.2704404120. The cubic root of 2161066313 is about 1292.8734921478.

Adding to 2161066313 its reverse (3136601612), we get a palindrome (5297667925).

The spelling of 2161066313 in words is "two billion, one hundred sixty-one million, sixty-six thousand, three hundred thirteen".