2161141345 has 16 divisors (see below), whose sum is σ = 2831182272. Its totient is φ = 1570599360.

The previous prime is 2161141327. The next prime is 2161141349. The reversal of 2161141345 is 5431411612.

It is not a de Polignac number, because 2161141345 - 2⁹ = 2161140833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161141349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66394 + ... + 93436.

It is an arithmetic number, because the mean of its divisors is an integer number (176948892).

Almost surely, 2^2161141345 is an apocalyptic number.

It is an amenable number.

2161141345 is a deficient number, since it is larger than the sum of its proper divisors (670040927).

2161141345 is a wasteful number, since it uses less digits than its factorization.

2161141345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28512.

The product of its digits is 2880, while the sum is 28.

The square root of 2161141345 is about 46488.0774500301. The cubic root of 2161141345 is about 1292.8884547862. Note that the first 3 decimals are identical.

Adding to 2161141345 its reverse (5431411612), we get a palindrome (7592552957).

The spelling of 2161141345 in words is "two billion, one hundred sixty-one million, one hundred forty-one thousand, three hundred forty-five".