25216567 has 2 divisors, whose sum is σ = 25216568. Its totient is φ = 25216566.

The previous prime is 25216507. The next prime is 25216571. The reversal of 25216567 is 76561252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25216567 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25216507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12608283 + 12608284.

It is an arithmetic number, because the mean of its divisors is an integer number (12608284).

Almost surely, 2^25216567 is an apocalyptic number.

25216567 is a deficient number, since it is larger than the sum of its proper divisors (1).

25216567 is an equidigital number, since it uses as much as digits as its factorization.

25216567 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 25216567 is about 5021.6100007866. The cubic root of 25216567 is about 293.2436751065.

The spelling of 25216567 in words is "twenty-five million, two hundred sixteen thousand, five hundred sixty-seven".