2781281347 has 16 divisors (see below), whose sum is σ = 3037565440. Its totient is φ = 2531142432.

The previous prime is 2781281329. The next prime is 2781281369. The reversal of 2781281347 is 7431821872.

It is not a de Polignac number, because 2781281347 - 2¹⁹ = 2780757059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2781281747) by changing a digit.

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, 905308 + ... + 908374.

It is an arithmetic number, because the mean of its divisors is an integer number (189847840).

Almost surely, 2^2781281347 is an apocalyptic number.

2781281347 is a deficient number, since it is larger than the sum of its proper divisors (256284093).

2781281347 is a wasteful number, since it uses less digits than its factorization.

2781281347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042.

The product of its digits is 150528, while the sum is 43.

The square root of 2781281347 is about 52737.8549715477. The cubic root of 2781281347 is about 1406.3118654804.

The spelling of 2781281347 in words is "two billion, seven hundred eighty-one million, two hundred eighty-one thousand, three hundred forty-seven".