25565311 has 2 divisors, whose sum is σ = 25565312. Its totient is φ = 25565310.

The previous prime is 25565303. The next prime is 25565329. The reversal of 25565311 is 11356552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25565311 - 2³ = 25565303 is a prime.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 25565311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25565341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12782655 + 12782656.

It is an arithmetic number, because the mean of its divisors is an integer number (12782656).

Almost surely, 2^25565311 is an apocalyptic number.

25565311 is a deficient number, since it is larger than the sum of its proper divisors (1).

25565311 is an equidigital number, since it uses as much as digits as its factorization.

25565311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 28.

The square root of 25565311 is about 5056.2150864060. The cubic root of 25565311 is about 294.5893395426.

The spelling of 25565311 in words is "twenty-five million, five hundred sixty-five thousand, three hundred eleven".