2525168209 has 4 divisors (see below), whose sum is σ = 2606625280. Its totient is φ = 2443711140.

The previous prime is 2525168197. The next prime is 2525168213. The reversal of 2525168209 is 9028615252.

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 2525168209 - 2¹³ = 2525160017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2525168279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40728489 + ... + 40728550.

It is an arithmetic number, because the mean of its divisors is an integer number (651656320).

Almost surely, 2^2525168209 is an apocalyptic number.

It is an amenable number.

2525168209 is a deficient number, since it is larger than the sum of its proper divisors (81457071).

2525168209 is an equidigital number, since it uses as much as digits as its factorization.

2525168209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81457070.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 2525168209 is about 50251.0518198376. The cubic root of 2525168209 is about 1361.7480781587.

The spelling of 2525168209 in words is "two billion, five hundred twenty-five million, one hundred sixty-eight thousand, two hundred nine".