109505555 has 4 divisors (see below), whose sum is σ = 131406672. Its totient is φ = 87604440.

The previous prime is 109505549. The next prime is 109505567. The reversal of 109505555 is 555505901.

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

It is not a de Polignac number, because 109505555 - 2⁶ = 109505491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10950551 + ... + 10950560.

It is an arithmetic number, because the mean of its divisors is an integer number (32851668).

Almost surely, 2^109505555 is an apocalyptic number.

109505555 is a deficient number, since it is larger than the sum of its proper divisors (21901117).

109505555 is an equidigital number, since it uses as much as digits as its factorization.

109505555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21901116.

The product of its (nonzero) digits is 28125, while the sum is 35.

The square root of 109505555 is about 10464.4901930290. The cubic root of 109505555 is about 478.4230002099.

The spelling of 109505555 in words is "one hundred nine million, five hundred five thousand, five hundred fifty-five".