25440055 has 8 divisors (see below), whose sum is σ = 30808800. Its totient is φ = 20164896.

The previous prime is 25440043. The next prime is 25440061. The reversal of 25440055 is 55004452.

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 25440055 - 2⁷ = 25439927 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22795 + ... + 23884.

It is an arithmetic number, because the mean of its divisors is an integer number (3851100).

Almost surely, 2^25440055 is an apocalyptic number.

25440055 is a deficient number, since it is larger than the sum of its proper divisors (5368745).

25440055 is a wasteful number, since it uses less digits than its factorization.

25440055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46793.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 25440055 is about 5043.8135373941. The cubic root of 25440055 is about 294.1074429519.

The spelling of 25440055 in words is "twenty-five million, four hundred forty thousand, fifty-five".