25440255 has 24 divisors (see below), whose sum is σ = 44495568. Its totient is φ = 13445376.

The previous prime is 25440241. The next prime is 25440263. The reversal of 25440255 is 55204452.

25440255 is a `hidden beast` number, since 254 + 402 + 5 + 5 = 666.

It is not a de Polignac number, because 25440255 - 2¹⁰ = 25439231 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2584 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (1853982).

Almost surely, 2^25440255 is an apocalyptic number.

25440255 is a deficient number, since it is larger than the sum of its proper divisors (19055313).

25440255 is a wasteful number, since it uses less digits than its factorization.

25440255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5127 (or 5124 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 25440255 is about 5043.8333636233. The cubic root of 25440255 is about 294.1082136700.

The spelling of 25440255 in words is "twenty-five million, four hundred forty thousand, two hundred fifty-five".