105155555 has 4 divisors (see below), whose sum is σ = 126186672. Its totient is φ = 84124440.

The previous prime is 105155549. The next prime is 105155569. The reversal of 105155555 is 555551501.

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

It is not a de Polignac number, because 105155555 - 2⁸ = 105155299 is a prime.

It is a super-2 number, since 2×105155555² = 22115381494716050, which contains 22 as substring.

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, 10515551 + ... + 10515560.

It is an arithmetic number, because the mean of its divisors is an integer number (31546668).

Almost surely, 2^105155555 is an apocalyptic number.

105155555 is a deficient number, since it is larger than the sum of its proper divisors (21031117).

105155555 is an equidigital number, since it uses as much as digits as its factorization.

105155555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21031116.

The product of its (nonzero) digits is 15625, while the sum is 32.

The square root of 105155555 is about 10254.5382636177. The cubic root of 105155555 is about 472.0022547891.

The spelling of 105155555 in words is "one hundred five million, one hundred fifty-five thousand, five hundred fifty-five".