25172227 has 2 divisors, whose sum is σ = 25172228. Its totient is φ = 25172226.

The previous prime is 25172221. The next prime is 25172239. The reversal of 25172227 is 72227152.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25172227 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25172195 and 25172204.

It is not a weakly prime, because it can be changed into another prime (25172221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12586113 + 12586114.

It is an arithmetic number, because the mean of its divisors is an integer number (12586114).

Almost surely, 2^25172227 is an apocalyptic number.

25172227 is a deficient number, since it is larger than the sum of its proper divisors (1).

25172227 is an equidigital number, since it uses as much as digits as its factorization.

25172227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3920, while the sum is 28.

The square root of 25172227 is about 5017.1931395951. The cubic root of 25172227 is about 293.0716975197.

Adding to 25172227 its reverse (72227152), we get a palindrome (97399379).

The spelling of 25172227 in words is "twenty-five million, one hundred seventy-two thousand, two hundred twenty-seven".