105115555 has 4 divisors (see below), whose sum is σ = 126138672. Its totient is φ = 84092440.

The previous prime is 105115529. The next prime is 105115601. The reversal of 105115555 is 555511501.

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

It is not a de Polignac number, because 105115555 - 2⁵ = 105115523 is a prime.

It is a super-2 number, since 2×105115555² = 22098559805916050, which contains 22 as substring.

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, 10511551 + ... + 10511560.

It is an arithmetic number, because the mean of its divisors is an integer number (31534668).

Almost surely, 2^105115555 is an apocalyptic number.

105115555 is a deficient number, since it is larger than the sum of its proper divisors (21023117).

105115555 is an equidigital number, since it uses as much as digits as its factorization.

105115555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21023116.

The product of its (nonzero) digits is 3125, while the sum is 28.

The square root of 105115555 is about 10252.5877221314. The cubic root of 105115555 is about 471.9423990683.

The spelling of 105115555 in words is "one hundred five million, one hundred fifteen thousand, five hundred fifty-five".