2161342326 has 32 divisors (see below), whose sum is σ = 5078400768. Its totient is φ = 604571040.

The previous prime is 2161342319. The next prime is 2161342331. The reversal of 2161342326 is 6232431612.

It is a junction number, because it is equal to n+sod(n) for n = 2161342293 and 2161342302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1258666 + ... + 1260381.

It is an arithmetic number, because the mean of its divisors is an integer number (158700024).

Almost surely, 2^2161342326 is an apocalyptic number.

2161342326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2161342326 is an abundant number, since it is smaller than the sum of its proper divisors (2917058442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161342326 is a wasteful number, since it uses less digits than its factorization.

2161342326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519076.

The product of its digits is 10368, while the sum is 30.

The square root of 2161342326 is about 46490.2390400394. The cubic root of 2161342326 is about 1292.9285320600.

Adding to 2161342326 its reverse (6232431612), we get a palindrome (8393773938).

The spelling of 2161342326 in words is "two billion, one hundred sixty-one million, three hundred forty-two thousand, three hundred twenty-six".