63555 has 16 divisors (see below), whose sum is σ = 107520. Its totient is φ = 31968.

The previous prime is 63541. The next prime is 63559. The reversal of 63555 is 55536.

63555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

63555 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 63555 - 2⁸ = 63299 is a prime.

Its product of digits (2250) is a multiple of the sum of its prime divisors (250).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (63559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174 + ... + 396.

It is an arithmetic number, because the mean of its divisors is an integer number (6720).

2⁶³⁵⁵⁵ is an apocalyptic number.

63555 is a deficient number, since it is larger than the sum of its proper divisors (43965).

63555 is a wasteful number, since it uses less digits than its factorization.

63555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250.

The product of its digits is 2250, while the sum is 24.

The square root of 63555 is about 252.1011701679. The cubic root of 63555 is about 39.9070759619.

The spelling of 63555 in words is "sixty-three thousand, five hundred fifty-five".