25545251 has 2 divisors, whose sum is σ = 25545252. Its totient is φ = 25545250.

The previous prime is 25545227. The next prime is 25545263. The reversal of 25545251 is 15254552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25545251 - 2¹⁸ = 25283107 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25545451) 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, 12772625 + 12772626.

It is an arithmetic number, because the mean of its divisors is an integer number (12772626).

Almost surely, 2^25545251 is an apocalyptic number.

25545251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25545251 is an equidigital number, since it uses as much as digits as its factorization.

25545251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10000, while the sum is 29.

The square root of 25545251 is about 5054.2309998654. The cubic root of 25545251 is about 294.5122688528.

The spelling of 25545251 in words is "twenty-five million, five hundred forty-five thousand, two hundred fifty-one".