25431227 has 2 divisors, whose sum is σ = 25431228. Its totient is φ = 25431226.

The previous prime is 25431223. The next prime is 25431271. The reversal of 25431227 is 72213452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25431227 - 2² = 25431223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25431196 and 25431205.

It is not a weakly prime, because it can be changed into another prime (25431221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715613 + 12715614.

It is an arithmetic number, because the mean of its divisors is an integer number (12715614).

Almost surely, 2^25431227 is an apocalyptic number.

25431227 is a deficient number, since it is larger than the sum of its proper divisors (1).

25431227 is an equidigital number, since it uses as much as digits as its factorization.

25431227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 26.

The square root of 25431227 is about 5042.9383299818. The cubic root of 25431227 is about 294.0734194289.

Adding to 25431227 its reverse (72213452), we get a palindrome (97644679).

The spelling of 25431227 in words is "twenty-five million, four hundred thirty-one thousand, two hundred twenty-seven".