25505111 has 2 divisors, whose sum is σ = 25505112. Its totient is φ = 25505110.

The previous prime is 25505101. The next prime is 25505159. The reversal of 25505111 is 11150552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25505111 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25505101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12752555 + 12752556.

It is an arithmetic number, because the mean of its divisors is an integer number (12752556).

Almost surely, 2^25505111 is an apocalyptic number.

25505111 is a deficient number, since it is larger than the sum of its proper divisors (1).

25505111 is an equidigital number, since it uses as much as digits as its factorization.

25505111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 25505111 is about 5050.2585082350. The cubic root of 25505111 is about 294.3579294047.

Adding to 25505111 its reverse (11150552), we get a palindrome (36655663).

The spelling of 25505111 in words is "twenty-five million, five hundred five thousand, one hundred eleven".