25505299 has 2 divisors, whose sum is σ = 25505300. Its totient is φ = 25505298.

The previous prime is 25505279. The next prime is 25505303. The reversal of 25505299 is 99250552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25505299 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25505209) 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 as a sum of consecutive naturals, namely, 12752649 + 12752650.

It is an arithmetic number, because the mean of its divisors is an integer number (12752650).

Almost surely, 2^25505299 is an apocalyptic number.

25505299 is a deficient number, since it is larger than the sum of its proper divisors (1).

25505299 is an equidigital number, since it uses as much as digits as its factorization.

25505299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 25505299 is about 5050.2771211093. The cubic root of 25505299 is about 294.3586526474.

The spelling of 25505299 in words is "twenty-five million, five hundred five thousand, two hundred ninety-nine".