2543431161 has 8 divisors (see below), whose sum is σ = 3391509184. Its totient is φ = 1695486960.

The previous prime is 2543431157. The next prime is 2543431237. The reversal of 2543431161 is 1611343452.

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

It is not a de Polignac number, because 2543431161 - 2² = 2543431157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2543431141) 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, 25980 + ... + 75906.

It is an arithmetic number, because the mean of its divisors is an integer number (423938648).

Almost surely, 2^2543431161 is an apocalyptic number.

It is an amenable number.

2543431161 is a deficient number, since it is larger than the sum of its proper divisors (848078023).

2543431161 is a wasteful number, since it uses less digits than its factorization.

2543431161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66911.

The product of its digits is 8640, while the sum is 30.

The square root of 2543431161 is about 50432.4415530321. The cubic root of 2543431161 is about 1365.0230843149.

The spelling of 2543431161 in words is "two billion, five hundred forty-three million, four hundred thirty-one thousand, one hundred sixty-one".