25525109 has 8 divisors (see below), whose sum is σ = 27093528. Its totient is φ = 23964160.

The previous prime is 25525103. The next prime is 25525127. The reversal of 25525109 is 90152552.

It can be written as a sum of positive squares in 4 ways, for example, as 9284209 + 16240900 = 3047^2 + 4030^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25525109 - 2²⁰ = 24476533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25525103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6209 + ... + 9465.

It is an arithmetic number, because the mean of its divisors is an integer number (3386691).

Almost surely, 2^25525109 is an apocalyptic number.

It is an amenable number.

25525109 is a deficient number, since it is larger than the sum of its proper divisors (1568419).

25525109 is a wasteful number, since it uses less digits than its factorization.

25525109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3735.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 25525109 is about 5052.2380189377. The cubic root of 25525109 is about 294.4348425122.

The spelling of 25525109 in words is "twenty-five million, five hundred twenty-five thousand, one hundred nine".