25616287 has 2 divisors, whose sum is σ = 25616288. Its totient is φ = 25616286.

The previous prime is 25616257. The next prime is 25616291. The reversal of 25616287 is 78261652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25616287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25616257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12808143 + 12808144.

It is an arithmetic number, because the mean of its divisors is an integer number (12808144).

Almost surely, 2^25616287 is an apocalyptic number.

25616287 is a deficient number, since it is larger than the sum of its proper divisors (1).

25616287 is an equidigital number, since it uses as much as digits as its factorization.

25616287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 25616287 is about 5061.2535008632. The cubic root of 25616287 is about 294.7850085380.

The spelling of 25616287 in words is "twenty-five million, six hundred sixteen thousand, two hundred eighty-seven".