105198213 has 4 divisors (see below), whose sum is σ = 140264288. Its totient is φ = 70132140.

The previous prime is 105198209. The next prime is 105198259. The reversal of 105198213 is 312891501.

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.

It is not a de Polignac number, because 105198213 - 2² = 105198209 is a prime.

It is a super-2 number, since 2×105198213² = 22133328036786738, 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 (105198413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17533033 + ... + 17533038.

It is an arithmetic number, because the mean of its divisors is an integer number (35066072).

Almost surely, 2^105198213 is an apocalyptic number.

It is an amenable number.

105198213 is a deficient number, since it is larger than the sum of its proper divisors (35066075).

105198213 is an equidigital number, since it uses as much as digits as its factorization.

105198213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35066074.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 105198213 is about 10256.6180098510. The cubic root of 105198213 is about 472.0660711995.

The spelling of 105198213 in words is "one hundred five million, one hundred ninety-eight thousand, two hundred thirteen".