2781331543 has 4 divisors (see below), whose sum is σ = 2782473408. Its totient is φ = 2780189680.

The previous prime is 2781331541. The next prime is 2781331583. The reversal of 2781331543 is 3451331872.

2781331543 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.

It is a cyclic number.

It is not a de Polignac number, because 2781331543 - 2¹ = 2781331541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781331541) 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, 567271 + ... + 572152.

It is an arithmetic number, because the mean of its divisors is an integer number (695618352).

Almost surely, 2^2781331543 is an apocalyptic number.

2781331543 is a deficient number, since it is larger than the sum of its proper divisors (1141865).

2781331543 is a wasteful number, since it uses less digits than its factorization.

2781331543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141864.

The product of its digits is 60480, while the sum is 37.

The square root of 2781331543 is about 52738.3308704400. The cubic root of 2781331543 is about 1406.3203257064.

The spelling of 2781331543 in words is "two billion, seven hundred eighty-one million, three hundred thirty-one thousand, five hundred forty-three".