25216493 has 2 divisors, whose sum is σ = 25216494. Its totient is φ = 25216492.

The previous prime is 25216483. The next prime is 25216507. The reversal of 25216493 is 39461252.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19518724 + 5697769 = 4418^2 + 2387^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25216493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25216403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12608246 + 12608247.

It is an arithmetic number, because the mean of its divisors is an integer number (12608247).

Almost surely, 2^25216493 is an apocalyptic number.

It is an amenable number.

25216493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25216493 is an equidigital number, since it uses as much as digits as its factorization.

25216493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 25216493 is about 5021.6026326264. The cubic root of 25216493 is about 293.2433882574.

The spelling of 25216493 in words is "twenty-five million, two hundred sixteen thousand, four hundred ninety-three".