25225909 has 16 divisors (see below), whose sum is σ = 27841536. Its totient is φ = 22752000.

The previous prime is 25225903. The next prime is 25225913. The reversal of 25225909 is 90952252.

It is a cyclic number.

It is not a de Polignac number, because 25225909 - 2⁵ = 25225877 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 (25225903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79419 + ... + 79735.

It is an arithmetic number, because the mean of its divisors is an integer number (1740096).

Almost surely, 2^25225909 is an apocalyptic number.

It is an amenable number.

25225909 is a deficient number, since it is larger than the sum of its proper divisors (2615627).

25225909 is a wasteful number, since it uses less digits than its factorization.

25225909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 25225909 is about 5022.5400944144. The cubic root of 25225909 is about 293.2798833684.

The spelling of 25225909 in words is "twenty-five million, two hundred twenty-five thousand, nine hundred nine".