25531171 has 2 divisors, whose sum is σ = 25531172. Its totient is φ = 25531170.

The previous prime is 25531169. The next prime is 25531189. The reversal of 25531171 is 17113552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25531171 - 2¹ = 25531169 is a prime.

Together with 25531169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25531111) 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, 12765585 + 12765586.

It is an arithmetic number, because the mean of its divisors is an integer number (12765586).

Almost surely, 2^25531171 is an apocalyptic number.

25531171 is a deficient number, since it is larger than the sum of its proper divisors (1).

25531171 is an equidigital number, since it uses as much as digits as its factorization.

25531171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1050, while the sum is 25.

The square root of 25531171 is about 5052.8379154689. The cubic root of 25531171 is about 294.4581492718.

The spelling of 25531171 in words is "twenty-five million, five hundred thirty-one thousand, one hundred seventy-one".