2943243281 has 4 divisors (see below), whose sum is σ = 3210810864. Its totient is φ = 2675675700.

The previous prime is 2943243253. The next prime is 2943243389. The reversal of 2943243281 is 1823423492.

It is a happy number.

2943243281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2943243281 is a prime.

It is a super-2 number, since 2×2943243281² = 17325362022303289922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2943243211) 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, 133783775 + ... + 133783796.

It is an arithmetic number, because the mean of its divisors is an integer number (802702716).

Almost surely, 2^2943243281 is an apocalyptic number.

It is an amenable number.

2943243281 is a deficient number, since it is larger than the sum of its proper divisors (267567583).

2943243281 is a wasteful number, since it uses less digits than its factorization.

2943243281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267567582.

The product of its digits is 82944, while the sum is 38.

The square root of 2943243281 is about 54251.6661587458. Note that the first 3 decimals coincide. The cubic root of 2943243281 is about 1433.0963407641.

The spelling of 2943243281 in words is "two billion, nine hundred forty-three million, two hundred forty-three thousand, two hundred eighty-one".