163555 has 8 divisors (see below), whose sum is σ = 224352. Its totient is φ = 112128.

The previous prime is 163543. The next prime is 163561. The reversal of 163555 is 555361.

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 163555 - 2¹¹ = 161507 is a prime.

It is a Duffinian 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, 2302 + ... + 2371.

It is an arithmetic number, because the mean of its divisors is an integer number (28044).

2¹⁶³⁵⁵⁵ is an apocalyptic number.

163555 is a deficient number, since it is larger than the sum of its proper divisors (60797).

163555 is an equidigital number, since it uses as much as digits as its factorization.

163555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685.

The product of its digits is 2250, while the sum is 25.

The square root of 163555 is about 404.4193368275. The cubic root of 163555 is about 54.6874838095.

The spelling of 163555 in words is "one hundred sixty-three thousand, five hundred fifty-five".