105551111 has 8 divisors (see below), whose sum is σ = 108274320. Its totient is φ = 102840192.

The previous prime is 105551093. The next prime is 105551119. The reversal of 105551111 is 111155501.

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 105551111 - 2²⁶ = 38442247 is a prime.

It is a super-2 number, since 2×105551111² = 22282074066668642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105551119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15785 + ... + 21453.

It is an arithmetic number, because the mean of its divisors is an integer number (13534290).

Almost surely, 2^105551111 is an apocalyptic number.

105551111 is a deficient number, since it is larger than the sum of its proper divisors (2723209).

105551111 is an equidigital number, since it uses as much as digits as its factorization.

105551111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145.

The product of its (nonzero) digits is 125, while the sum is 20.

The square root of 105551111 is about 10273.8070353691. The cubic root of 105551111 is about 472.5933464315.

The spelling of 105551111 in words is "one hundred five million, five hundred fifty-one thousand, one hundred eleven".