2161141131 has 4 divisors (see below), whose sum is σ = 2881521512. Its totient is φ = 1440760752.

The previous prime is 2161141127. The next prime is 2161141141. The reversal of 2161141131 is 1311411612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2161141131 - 2² = 2161141127 is a prime.

It is a super-2 number, since 2×2161141131² = 9341061976199918322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2161141098 and 2161141107.

It is not an unprimeable number, because it can be changed into a prime (2161141121) 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, 360190186 + ... + 360190191.

It is an arithmetic number, because the mean of its divisors is an integer number (720380378).

Almost surely, 2^2161141131 is an apocalyptic number.

2161141131 is a deficient number, since it is larger than the sum of its proper divisors (720380381).

2161141131 is an equidigital number, since it uses as much as digits as its factorization.

2161141131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720380380.

The product of its digits is 144, while the sum is 21.

The square root of 2161141131 is about 46488.0751483647. The cubic root of 2161141131 is about 1292.8884121115. Note that the first 3 decimals are identical.

Adding to 2161141131 its reverse (1311411612), we get a palindrome (3472552743).

The spelling of 2161141131 in words is "two billion, one hundred sixty-one million, one hundred forty-one thousand, one hundred thirty-one".