2505001613 has 4 divisors (see below), whose sum is σ = 2505121728. Its totient is φ = 2504881500.

The previous prime is 2505001607. The next prime is 2505001627. The reversal of 2505001613 is 3161005052.

2505001613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2505001613 - 2⁶ = 2505001549 is a prime.

It is a super-2 number, since 2×2505001613² = 12550066162265203538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505001673) 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, 19763 + ... + 73488.

It is an arithmetic number, because the mean of its divisors is an integer number (626280432).

Almost surely, 2^2505001613 is an apocalyptic number.

It is an amenable number.

2505001613 is a deficient number, since it is larger than the sum of its proper divisors (120115).

2505001613 is an equidigital number, since it uses as much as digits as its factorization.

2505001613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120114.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 2505001613 is about 50049.9911388604. The cubic root of 2505001613 is about 1358.1133031368.

Adding to 2505001613 its reverse (3161005052), we get a palindrome (5666006665).

The spelling of 2505001613 in words is "two billion, five hundred five million, one thousand, six hundred thirteen".