2611431517 has 4 divisors (see below), whose sum is σ = 2611540476. Its totient is φ = 2611322560.

The previous prime is 2611431467. The next prime is 2611431521. The reversal of 2611431517 is 7151341162.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1204506436 + 1406925081 = 34706^2 + 37509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2611431517 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 (2611431577) 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 3 ways as a sum of consecutive naturals, for example, 1084 + ... + 72277.

It is an arithmetic number, because the mean of its divisors is an integer number (652885119).

Almost surely, 2^2611431517 is an apocalyptic number.

It is an amenable number.

2611431517 is a deficient number, since it is larger than the sum of its proper divisors (108959).

2611431517 is an equidigital number, since it uses as much as digits as its factorization.

2611431517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108958.

The product of its digits is 5040, while the sum is 31.

The square root of 2611431517 is about 51102.1674393562. The cubic root of 2611431517 is about 1377.0811929228.

Adding to 2611431517 its reverse (7151341162), we get a palindrome (9762772679).

The spelling of 2611431517 in words is "two billion, six hundred eleven million, four hundred thirty-one thousand, five hundred seventeen".