25555225 has 6 divisors (see below), whose sum is σ = 31688510. Its totient is φ = 20444160.

The previous prime is 25555223. The next prime is 25555237. The reversal of 25555225 is 52255552.

It can be written as a sum of positive squares in 3 ways, for example, as 4173849 + 21381376 = 2043^2 + 4624^2 .

It is not a de Polignac number, because 25555225 - 2¹ = 25555223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25555223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 511080 + ... + 511129.

Almost surely, 2^25555225 is an apocalyptic number.

25555225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25555225 is a deficient number, since it is larger than the sum of its proper divisors (6133285).

25555225 is a wasteful number, since it uses less digits than its factorization.

25555225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022219 (or 1022214 counting only the distinct ones).

The product of its digits is 25000, while the sum is 31.

The square root of 25555225 is about 5055.2176016468. The cubic root of 25555225 is about 294.5505940865.

The spelling of 25555225 in words is "twenty-five million, five hundred fifty-five thousand, two hundred twenty-five".