25325509 has 8 divisors (see below), whose sum is σ = 27887328. Its totient is φ = 22806960.

The previous prime is 25325491. The next prime is 25325519. The reversal of 25325509 is 90552352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25325509 - 2⁹ = 25324997 is a prime.

It is a super-2 number, since 2×25325509² = 1282762812218162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25325519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9582 + ... + 11935.

It is an arithmetic number, because the mean of its divisors is an integer number (3485916).

Almost surely, 2^25325509 is an apocalyptic number.

It is an amenable number.

25325509 is a deficient number, since it is larger than the sum of its proper divisors (2561819).

25325509 is a wasteful number, since it uses less digits than its factorization.

25325509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21635.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 25325509 is about 5032.4456281216. The cubic root of 25325509 is about 293.6653642392.

The spelling of 25325509 in words is "twenty-five million, three hundred twenty-five thousand, five hundred nine".