2543363781 has 16 divisors (see below), whose sum is σ = 3958063104. Its totient is φ = 1422427824.

The previous prime is 2543363773. The next prime is 2543363789. The reversal of 2543363781 is 1873633452.

2543363781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2543363773) and next prime (2543363789).

It is not a de Polignac number, because 2543363781 - 2³ = 2543363773 is a prime.

It is a super-2 number, since 2×2543363781² = 12937398645005231922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543363789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1287445 + ... + 1289418.

It is an arithmetic number, because the mean of its divisors is an integer number (247378944).

Almost surely, 2^2543363781 is an apocalyptic number.

2543363781 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2543363781 is a deficient number, since it is larger than the sum of its proper divisors (1414699323).

2543363781 is a wasteful number, since it uses less digits than its factorization.

2543363781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576920.

The product of its digits is 362880, while the sum is 42.

The square root of 2543363781 is about 50431.7735262206. The cubic root of 2543363781 is about 1365.0110302481.

The spelling of 2543363781 in words is "two billion, five hundred forty-three million, three hundred sixty-three thousand, seven hundred eighty-one".