109555 has 4 divisors (see below), whose sum is σ = 131472. Its totient is φ = 87640.

The previous prime is 109547. The next prime is 109567. The reversal of 109555 is 555901.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 109555 - 2³ = 109547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10951 + ... + 10960.

It is an arithmetic number, because the mean of its divisors is an integer number (32868).

2¹⁰⁹⁵⁵⁵ is an apocalyptic number.

109555 is a deficient number, since it is larger than the sum of its proper divisors (21917).

109555 is an equidigital number, since it uses as much as digits as its factorization.

109555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21916.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 109555 is about 330.9909364318. The cubic root of 109555 is about 47.8494996758.

The spelling of 109555 in words is "one hundred nine thousand, five hundred fifty-five".