25561055 has 8 divisors (see below), whose sum is σ = 33032832. Its totient is φ = 18875808.

The previous prime is 25561051. The next prime is 25561057. The reversal of 25561055 is 55016552.

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 25561055 - 2² = 25561051 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 (25561051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196559 + ... + 196688.

It is an arithmetic number, because the mean of its divisors is an integer number (4129104).

Almost surely, 2^25561055 is an apocalyptic number.

25561055 is a deficient number, since it is larger than the sum of its proper divisors (7471777).

25561055 is a wasteful number, since it uses less digits than its factorization.

25561055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393265.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 25561055 is about 5055.7942007166. The cubic root of 25561055 is about 294.5729913249.

The spelling of 25561055 in words is "twenty-five million, five hundred sixty-one thousand, fifty-five".