105558861 has 4 divisors (see below), whose sum is σ = 140745152. Its totient is φ = 70372572.

The previous prime is 105558857. The next prime is 105558877. The reversal of 105558861 is 168855501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168855501 = 3 ⋅56285167.

It is not a de Polignac number, because 105558861 - 2² = 105558857 is a prime.

It is a super-2 number, since 2×105558861² = 22285346271234642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105558821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17593141 + ... + 17593146.

It is an arithmetic number, because the mean of its divisors is an integer number (35186288).

Almost surely, 2^105558861 is an apocalyptic number.

It is an amenable number.

105558861 is a deficient number, since it is larger than the sum of its proper divisors (35186291).

105558861 is an equidigital number, since it uses as much as digits as its factorization.

105558861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35186290.

The product of its (nonzero) digits is 48000, while the sum is 39.

The square root of 105558861 is about 10274.1842011909. The cubic root of 105558861 is about 472.6049127357.

The spelling of 105558861 in words is "one hundred five million, five hundred fifty-eight thousand, eight hundred sixty-one".