2503261613 has 4 divisors (see below), whose sum is σ = 2503389660. Its totient is φ = 2503133568.

The previous prime is 2503261597. The next prime is 2503261639. The reversal of 2503261613 is 3161623052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1730310409 + 772951204 = 41597^2 + 27802^2 .

It is a cyclic number.

It is not a de Polignac number, because 2503261613 - 2⁴ = 2503261597 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 (2503261213) 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, 27908 + ... + 76061.

It is an arithmetic number, because the mean of its divisors is an integer number (625847415).

Almost surely, 2^2503261613 is an apocalyptic number.

It is an amenable number.

2503261613 is a deficient number, since it is larger than the sum of its proper divisors (128047).

2503261613 is a wasteful number, since it uses less digits than its factorization.

2503261613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128046.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2503261613 is about 50032.6054988145. The cubic root of 2503261613 is about 1357.7987771242.

Adding to 2503261613 its reverse (3161623052), we get a palindrome (5664884665).

The spelling of 2503261613 in words is "two billion, five hundred three million, two hundred sixty-one thousand, six hundred thirteen".