25505225 has 12 divisors (see below), whose sum is σ = 32100624. Its totient is φ = 20098320.

The previous prime is 25505213. The next prime is 25505231. The reversal of 25505225 is 52250552.

It is not a de Polignac number, because 25505225 - 2⁴ = 25505209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25505194 and 25505203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5939 + ... + 9288.

It is an arithmetic number, because the mean of its divisors is an integer number (2675052).

Almost surely, 2^25505225 is an apocalyptic number.

25505225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25505225 is a deficient number, since it is larger than the sum of its proper divisors (6595399).

25505225 is a wasteful number, since it uses less digits than its factorization.

25505225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15304 (or 15299 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 25505225 is about 5050.2697947733. The cubic root of 25505225 is about 294.3583679672.

Adding to 25505225 its reverse (52250552), we get a palindrome (77755777).

The spelling of 25505225 in words is "twenty-five million, five hundred five thousand, two hundred twenty-five".