25824217 has 2 divisors, whose sum is σ = 25824218. Its totient is φ = 25824216.

The previous prime is 25824203. The next prime is 25824223. The reversal of 25824217 is 71242852.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15397776 + 10426441 = 3924^2 + 3229^2 .

It is a cyclic number.

It is not a de Polignac number, because 25824217 - 2¹⁹ = 25299929 is a prime.

It is not a weakly prime, because it can be changed into another prime (25824257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12912108 + 12912109.

It is an arithmetic number, because the mean of its divisors is an integer number (12912109).

Almost surely, 2^25824217 is an apocalyptic number.

It is an amenable number.

25824217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25824217 is an equidigital number, since it uses as much as digits as its factorization.

25824217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 31.

The square root of 25824217 is about 5081.7533391537. The cubic root of 25824217 is about 295.5804600897.

The spelling of 25824217 in words is "twenty-five million, eight hundred twenty-four thousand, two hundred seventeen".