26225209 has 2 divisors, whose sum is σ = 26225210. Its totient is φ = 26225208.

The previous prime is 26225191. The next prime is 26225239. The reversal of 26225209 is 90252262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 9903609 = 4040^2 + 3147^2 .

It is a cyclic number.

It is not a de Polignac number, because 26225209 - 2¹⁹ = 25700921 is a prime.

It is not a weakly prime, because it can be changed into another prime (26225239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13112604 + 13112605.

It is an arithmetic number, because the mean of its divisors is an integer number (13112605).

Almost surely, 2^26225209 is an apocalyptic number.

It is an amenable number.

26225209 is a deficient number, since it is larger than the sum of its proper divisors (1).

26225209 is an equidigital number, since it uses as much as digits as its factorization.

26225209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 26225209 is about 5121.0554576181. The cubic root of 26225209 is about 297.1025089512.

The spelling of 26225209 in words is "twenty-six million, two hundred twenty-five thousand, two hundred nine".