2542131517 has 2 divisors, whose sum is σ = 2542131518. Its totient is φ = 2542131516.

The previous prime is 2542131497. The next prime is 2542131541. The reversal of 2542131517 is 7151312452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1503423076 + 1038708441 = 38774^2 + 32229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2542131517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2542135517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271065758 + 1271065759.

It is an arithmetic number, because the mean of its divisors is an integer number (1271065759).

Almost surely, 2^2542131517 is an apocalyptic number.

It is an amenable number.

2542131517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2542131517 is an equidigital number, since it uses as much as digits as its factorization.

2542131517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 31.

The square root of 2542131517 is about 50419.5549068018. The cubic root of 2542131517 is about 1364.7905445943.

Adding to 2542131517 its reverse (7151312452), we get a palindrome (9693443969).

The spelling of 2542131517 in words is "two billion, five hundred forty-two million, one hundred thirty-one thousand, five hundred seventeen".