25216657 has 2 divisors, whose sum is σ = 25216658. Its totient is φ = 25216656.

The previous prime is 25216613. The next prime is 25216669. The reversal of 25216657 is 75661252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16072081 + 9144576 = 4009^2 + 3024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25216657 is a prime.

It is not a weakly prime, because it can be changed into another prime (25216687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12608328 + 12608329.

It is an arithmetic number, because the mean of its divisors is an integer number (12608329).

Almost surely, 2^25216657 is an apocalyptic number.

It is an amenable number.

25216657 is a deficient number, since it is larger than the sum of its proper divisors (1).

25216657 is an equidigital number, since it uses as much as digits as its factorization.

25216657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 25216657 is about 5021.6189620480. The cubic root of 25216657 is about 293.2440239764.

The spelling of 25216657 in words is "twenty-five million, two hundred sixteen thousand, six hundred fifty-seven".