2500081517 has 4 divisors (see below), whose sum is σ = 2542455840. Its totient is φ = 2457707196.

The previous prime is 2500081513. The next prime is 2500081613. The reversal of 2500081517 is 7151800052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2500081517 - 2² = 2500081513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2500081517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500081511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21187073 + ... + 21187190.

It is an arithmetic number, because the mean of its divisors is an integer number (635613960).

Almost surely, 2^2500081517 is an apocalyptic number.

It is an amenable number.

2500081517 is a deficient number, since it is larger than the sum of its proper divisors (42374323).

2500081517 is an equidigital number, since it uses as much as digits as its factorization.

2500081517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42374322.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 2500081517 is about 50000.8151633551. The cubic root of 2500081517 is about 1357.2235595492.

Adding to 2500081517 its reverse (7151800052), we get a palindrome (9651881569).

The spelling of 2500081517 in words is "two billion, five hundred million, eighty-one thousand, five hundred seventeen".