25226309 has 2 divisors, whose sum is σ = 25226310. Its totient is φ = 25226308.

The previous prime is 25226303. The next prime is 25226321. The reversal of 25226309 is 90362252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12623809 + 12602500 = 3553^2 + 3550^2 .

It is a cyclic number.

It is not a de Polignac number, because 25226309 - 2¹² = 25222213 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25226303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12613154 + 12613155.

It is an arithmetic number, because the mean of its divisors is an integer number (12613155).

Almost surely, 2^25226309 is an apocalyptic number.

It is an amenable number.

25226309 is a deficient number, since it is larger than the sum of its proper divisors (1).

25226309 is an equidigital number, since it uses as much as digits as its factorization.

25226309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 25226309 is about 5022.5799147450. The cubic root of 25226309 is about 293.2814335118.

The spelling of 25226309 in words is "twenty-five million, two hundred twenty-six thousand, three hundred nine".