2161423113 has 8 divisors (see below), whose sum is σ = 2885064576. Its totient is φ = 1439365200.

The previous prime is 2161423111. The next prime is 2161423123. The reversal of 2161423113 is 3113241612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2161423113 - 2¹ = 2161423111 is a prime.

It is a super-2 number, since 2×2161423113² = 9343499746821221538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2161423111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392698 + ... + 398163.

It is an arithmetic number, because the mean of its divisors is an integer number (360633072).

Almost surely, 2^2161423113 is an apocalyptic number.

It is an amenable number.

2161423113 is a deficient number, since it is larger than the sum of its proper divisors (723641463).

2161423113 is an equidigital number, since it uses as much as digits as its factorization.

2161423113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791775.

The product of its digits is 864, while the sum is 24.

The square root of 2161423113 is about 46491.1078917248. The cubic root of 2161423113 is about 1292.9446409559.

Adding to 2161423113 its reverse (3113241612), we get a palindrome (5274664725).

The spelling of 2161423113 in words is "two billion, one hundred sixty-one million, four hundred twenty-three thousand, one hundred thirteen".