25216397 has 2 divisors, whose sum is σ = 25216398. Its totient is φ = 25216396.

The previous prime is 25216391. The next prime is 25216403. The reversal of 25216397 is 79361252.

It is a balanced prime because it is at equal distance from previous prime (25216391) and next prime (25216403).

It can be written as a sum of positive squares in only one way, i.e., 25110121 + 106276 = 5011^2 + 326^2 .

It is a cyclic number.

It is not a de Polignac number, because 25216397 - 2⁶ = 25216333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25216391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12608198 + 12608199.

It is an arithmetic number, because the mean of its divisors is an integer number (12608199).

Almost surely, 2^25216397 is an apocalyptic number.

It is an amenable number.

25216397 is a deficient number, since it is larger than the sum of its proper divisors (1).

25216397 is an equidigital number, since it uses as much as digits as its factorization.

25216397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 35.

The square root of 25216397 is about 5021.5930739159. The cubic root of 25216397 is about 293.2430161279.

The spelling of 25216397 in words is "twenty-five million, two hundred sixteen thousand, three hundred ninety-seven".