25226647 has 2 divisors, whose sum is σ = 25226648. Its totient is φ = 25226646.

The previous prime is 25226627. The next prime is 25226651. The reversal of 25226647 is 74662252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25226647 - 2¹¹ = 25224599 is a prime.

It is equal to p_1579192 and since 25226647 and 1579192 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25226627) 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, 12613323 + 12613324.

It is an arithmetic number, because the mean of its divisors is an integer number (12613324).

Almost surely, 2^25226647 is an apocalyptic number.

25226647 is a deficient number, since it is larger than the sum of its proper divisors (1).

25226647 is an equidigital number, since it uses as much as digits as its factorization.

25226647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 34.

The square root of 25226647 is about 5022.6135626783. The cubic root of 25226647 is about 293.2827433703.

Adding to 25226647 its reverse (74662252), we get a palindrome (99888899).

The spelling of 25226647 in words is "twenty-five million, two hundred twenty-six thousand, six hundred forty-seven".