25555 has 8 divisors (see below), whose sum is σ = 32400. Its totient is φ = 19296.

The previous prime is 25541. The next prime is 25561. The reversal of 25555 is 55552.

25555 = T₁₆ + T₁₇ + ... + T₅₃.

25555 = 5² + 6² + ... + 42².

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 25555 - 2⁵ = 25523 is a prime.

25555 is a modest number, since divided by 555 gives 25 as remainder.

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40 + ... + 229.

It is an arithmetic number, because the mean of its divisors is an integer number (4050).

2²⁵⁵⁵⁵ is an apocalyptic number.

25555 is a deficient number, since it is larger than the sum of its proper divisors (6845).

25555 is a wasteful number, since it uses less digits than its factorization.

25555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293.

The product of its digits is 1250, while the sum is 22.

The square root of 25555 is about 159.8593131475. The cubic root of 25555 is about 29.4549729631.

The spelling of 25555 in words is "twenty-five thousand, five hundred fifty-five".