2565121199 has 2 divisors, whose sum is σ = 2565121200. Its totient is φ = 2565121198.

The previous prime is 2565121193. The next prime is 2565121213. The reversal of 2565121199 is 9911215652.

2565121199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2565121199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565121193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282560599 + 1282560600.

It is an arithmetic number, because the mean of its divisors is an integer number (1282560600).

Almost surely, 2^2565121199 is an apocalyptic number.

2565121199 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565121199 is an equidigital number, since it uses as much as digits as its factorization.

2565121199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 41.

The square root of 2565121199 is about 50647.0255691289. The cubic root of 2565121199 is about 1368.8923504807.

The spelling of 2565121199 in words is "two billion, five hundred sixty-five million, one hundred twenty-one thousand, one hundred ninety-nine".