25216507 has 2 divisors, whose sum is σ = 25216508. Its totient is φ = 25216506.

The previous prime is 25216493. The next prime is 25216567. The reversal of 25216507 is 70561252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25216507 - 2⁷ = 25216379 is a prime.

It is a Chen prime.

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

It is not a weakly prime, because it can be changed into another prime (25216567) 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, 12608253 + 12608254.

It is an arithmetic number, because the mean of its divisors is an integer number (12608254).

Almost surely, 2^25216507 is an apocalyptic number.

25216507 is a deficient number, since it is larger than the sum of its proper divisors (1).

25216507 is an equidigital number, since it uses as much as digits as its factorization.

25216507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 25216507 is about 5021.6040266035. The cubic root of 25216507 is about 293.2434425262.

Adding to 25216507 its reverse (70561252), we get a palindrome (95777759).

The spelling of 25216507 in words is "twenty-five million, two hundred sixteen thousand, five hundred seven".