2540115243 has 6 divisors (see below), whose sum is σ = 3669055364. Its totient is φ = 1693410156.

The previous prime is 2540115209. The next prime is 2540115247. The reversal of 2540115243 is 3425110452.

2540115243 is a `hidden beast` number, since 2 + 5 + 401 + 15 + 243 = 666.

It is not a de Polignac number, because 2540115243 - 2⁸ = 2540114987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540115247) 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 5 ways as a sum of consecutive naturals, for example, 141117505 + ... + 141117522.

Almost surely, 2^2540115243 is an apocalyptic number.

2540115243 is a deficient number, since it is larger than the sum of its proper divisors (1128940121).

2540115243 is a wasteful number, since it uses less digits than its factorization.

2540115243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282235033 (or 282235030 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 2540115243 is about 50399.5559801870. Note that the first 3 decimals coincide. The cubic root of 2540115243 is about 1364.4296244355.

Adding to 2540115243 its reverse (3425110452), we get a palindrome (5965225695).

The spelling of 2540115243 in words is "two billion, five hundred forty million, one hundred fifteen thousand, two hundred forty-three".