25317571 has 2 divisors, whose sum is σ = 25317572. Its totient is φ = 25317570.

The previous prime is 25317559. The next prime is 25317619. The reversal of 25317571 is 17571352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25317571 - 2⁹ = 25317059 is a prime.

It is not a weakly prime, because it can be changed into another prime (25317521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12658785 + 12658786.

It is an arithmetic number, because the mean of its divisors is an integer number (12658786).

Almost surely, 2^25317571 is an apocalyptic number.

25317571 is a deficient number, since it is larger than the sum of its proper divisors (1).

25317571 is an equidigital number, since it uses as much as digits as its factorization.

25317571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7350, while the sum is 31.

The square root of 25317571 is about 5031.6568841685. The cubic root of 25317571 is about 293.6346789822.

The spelling of 25317571 in words is "twenty-five million, three hundred seventeen thousand, five hundred seventy-one".