25617211 has 2 divisors, whose sum is σ = 25617212. Its totient is φ = 25617210.

The previous prime is 25617199. The next prime is 25617259. The reversal of 25617211 is 11271652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25617211 - 2⁹ = 25616699 is a prime.

It is not a weakly prime, because it can be changed into another prime (25617271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12808605 + 12808606.

It is an arithmetic number, because the mean of its divisors is an integer number (12808606).

Almost surely, 2^25617211 is an apocalyptic number.

25617211 is a deficient number, since it is larger than the sum of its proper divisors (1).

25617211 is an equidigital number, since it uses as much as digits as its factorization.

25617211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 25.

The square root of 25617211 is about 5061.3447817749. The cubic root of 25617211 is about 294.7885528726.

Adding to 25617211 its reverse (11271652), we get a palindrome (36888863).

The spelling of 25617211 in words is "twenty-five million, six hundred seventeen thousand, two hundred eleven".