2505200305 has 4 divisors (see below), whose sum is σ = 3006240372. Its totient is φ = 2004160240.

The previous prime is 2505200287. The next prime is 2505200323. The reversal of 2505200305 is 5030025052.

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

It is an interprime number because it is at equal distance from previous prime (2505200287) and next prime (2505200323).

It can be written as a sum of positive squares in 2 ways, for example, as 1635717136 + 869483169 = 40444^2 + 29487^2 .

It is not a de Polignac number, because 2505200305 - 2¹³ = 2505192113 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250520026 + ... + 250520035.

It is an arithmetic number, because the mean of its divisors is an integer number (751560093).

Almost surely, 2^2505200305 is an apocalyptic number.

It is an amenable number.

2505200305 is a deficient number, since it is larger than the sum of its proper divisors (501040067).

2505200305 is an equidigital number, since it uses as much as digits as its factorization.

2505200305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501040066.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 2505200305 is about 50051.9760349179. The cubic root of 2505200305 is about 1358.1492098488.

Adding to 2505200305 its reverse (5030025052), we get a palindrome (7535225357).

The spelling of 2505200305 in words is "two billion, five hundred five million, two hundred thousand, three hundred five".