2505212005 has 4 divisors (see below), whose sum is σ = 3006254412. Its totient is φ = 2004169600.

The previous prime is 2505211999. The next prime is 2505212011. The reversal of 2505212005 is 5002125052.

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 (2505211999) and next prime (2505212011).

It can be written as a sum of positive squares in 2 ways, for example, as 867714849 + 1637497156 = 29457^2 + 40466^2 .

It is not a de Polignac number, because 2505212005 - 2²⁹ = 1968341093 is a prime.

It is a super-2 number, since 2×2505212005² = 12552174379992240050, which contains 22 as substring.

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 a congruent 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, 250521196 + ... + 250521205.

It is an arithmetic number, because the mean of its divisors is an integer number (751563603).

Almost surely, 2^2505212005 is an apocalyptic number.

It is an amenable number.

2505212005 is a deficient number, since it is larger than the sum of its proper divisors (501042407).

2505212005 is an equidigital number, since it uses as much as digits as its factorization.

2505212005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501042406.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 2505212005 is about 50052.0929132839. The cubic root of 2505212005 is about 1358.1513241603.

Adding to 2505212005 its reverse (5002125052), we get a palindrome (7507337057).

The spelling of 2505212005 in words is "two billion, five hundred five million, two hundred twelve thousand, five".