25316217 has 12 divisors (see below), whose sum is σ = 37829220. Its totient is φ = 16295328.

The previous prime is 25316201. The next prime is 25316219. The reversal of 25316217 is 71261352.

It is a happy number.

25316217 is a `hidden beast` number, since 2 + 5 + 31 + 621 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6471936 + 18844281 = 2544^2 + 4341^2 .

It is not a de Polignac number, because 25316217 - 2⁴ = 25316201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25316219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48238 + ... + 48759.

It is an arithmetic number, because the mean of its divisors is an integer number (3152435).

Almost surely, 2^25316217 is an apocalyptic number.

It is an amenable number.

25316217 is a deficient number, since it is larger than the sum of its proper divisors (12513003).

25316217 is a wasteful number, since it uses less digits than its factorization.

25316217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97032 (or 97029 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 25316217 is about 5031.5223342444. The cubic root of 25316217 is about 293.6294442983.

Adding to 25316217 its reverse (71261352), we get a palindrome (96577569).

The spelling of 25316217 in words is "twenty-five million, three hundred sixteen thousand, two hundred seventeen".