105219085 has 4 divisors (see below), whose sum is σ = 126262908. Its totient is φ = 84175264.

The previous prime is 105219077. The next prime is 105219133. The reversal of 105219085 is 580912501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580912501 = 13 ⋅44685577.

It can be written as a sum of positive squares in 2 ways, for example, as 65642404 + 39576681 = 8102^2 + 6291^2 .

It is a cyclic number.

It is not a de Polignac number, because 105219085 - 2³ = 105219077 is a prime.

It is a super-2 number, since 2×105219085² = 22142111696474450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 10521904 + ... + 10521913.

It is an arithmetic number, because the mean of its divisors is an integer number (31565727).

Almost surely, 2^105219085 is an apocalyptic number.

It is an amenable number.

105219085 is a deficient number, since it is larger than the sum of its proper divisors (21043823).

105219085 is an equidigital number, since it uses as much as digits as its factorization.

105219085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21043822.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 105219085 is about 10257.6354487767. The cubic root of 105219085 is about 472.0972894467.

The spelling of 105219085 in words is "one hundred five million, two hundred nineteen thousand, eighty-five".