25189217 has 2 divisors, whose sum is σ = 25189218. Its totient is φ = 25189216.

The previous prime is 25189207. The next prime is 25189243. The reversal of 25189217 is 71298152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12967201 + 12222016 = 3601^2 + 3496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25189217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25189207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12594608 + 12594609.

It is an arithmetic number, because the mean of its divisors is an integer number (12594609).

Almost surely, 2^25189217 is an apocalyptic number.

It is an amenable number.

25189217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25189217 is an equidigital number, since it uses as much as digits as its factorization.

25189217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 35.

The square root of 25189217 is about 5018.8860317804. The cubic root of 25189217 is about 293.1376189590.

The spelling of 25189217 in words is "twenty-five million, one hundred eighty-nine thousand, two hundred seventeen".