2543715081 has 6 divisors (see below), whose sum is σ = 3674255130. Its totient is φ = 1695810048.

The previous prime is 2543715017. The next prime is 2543715101. The reversal of 2543715081 is 1805173452.

It can be written as a sum of positive squares in only one way, i.e., 2348274681 + 195440400 = 48459^2 + 13980^2 .

It is not a de Polignac number, because 2543715081 - 2⁶ = 2543715017 is a prime.

It is a super-2 number, since 2×2543715081² = 12940972826613673122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2543711081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141317496 + ... + 141317513.

It is an arithmetic number, because the mean of its divisors is an integer number (612375855).

Almost surely, 2^2543715081 is an apocalyptic number.

It is an amenable number.

2543715081 is a deficient number, since it is larger than the sum of its proper divisors (1130540049).

2543715081 is a wasteful number, since it uses less digits than its factorization.

2543715081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282635015 (or 282635012 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 2543715081 is about 50435.2563292782. The cubic root of 2543715081 is about 1365.0738743579.

The spelling of 2543715081 in words is "two billion, five hundred forty-three million, seven hundred fifteen thousand, eighty-one".