25332509 has 2 divisors, whose sum is σ = 25332510. Its totient is φ = 25332508.

The previous prime is 25332497. The next prime is 25332511. The reversal of 25332509 is 90523352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25030009 + 302500 = 5003^2 + 550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25332509 is a prime.

Together with 25332511, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25332539) 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, 12666254 + 12666255.

It is an arithmetic number, because the mean of its divisors is an integer number (12666255).

Almost surely, 2^25332509 is an apocalyptic number.

It is an amenable number.

25332509 is a deficient number, since it is larger than the sum of its proper divisors (1).

25332509 is an equidigital number, since it uses as much as digits as its factorization.

25332509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 25332509 is about 5033.1410669680. The cubic root of 25332509 is about 293.6924182290.

The spelling of 25332509 in words is "twenty-five million, three hundred thirty-two thousand, five hundred nine".