105661055 has 4 divisors (see below), whose sum is σ = 126793272. Its totient is φ = 84528840.

The previous prime is 105661043. The next prime is 105661081. The reversal of 105661055 is 550166501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550166501 = 107 ⋅5141743.

It is not a de Polignac number, because 105661055 - 2²⁶ = 38552191 is a prime.

It is a super-2 number, since 2×105661055² = 22328517087426050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 10566101 + ... + 10566110.

It is an arithmetic number, because the mean of its divisors is an integer number (31698318).

Almost surely, 2^105661055 is an apocalyptic number.

105661055 is a deficient number, since it is larger than the sum of its proper divisors (21132217).

105661055 is an equidigital number, since it uses as much as digits as its factorization.

105661055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21132216.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 105661055 is about 10279.1563369763. The cubic root of 105661055 is about 472.7573768315.

The spelling of 105661055 in words is "one hundred five million, six hundred sixty-one thousand, fifty-five".