105138219 has 4 divisors (see below), whose sum is σ = 140184296. Its totient is φ = 70092144.

The previous prime is 105138211. The next prime is 105138223. The reversal of 105138219 is 912831501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912831501 = 3 ⋅304277167.

It is not a de Polignac number, because 105138219 - 2³ = 105138211 is a prime.

It is a super-2 number, since 2×105138219² = 22108090188983922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105138211) 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, 17523034 + ... + 17523039.

It is an arithmetic number, because the mean of its divisors is an integer number (35046074).

Almost surely, 2^105138219 is an apocalyptic number.

105138219 is a deficient number, since it is larger than the sum of its proper divisors (35046077).

105138219 is an equidigital number, since it uses as much as digits as its factorization.

105138219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35046076.

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

The square root of 105138219 is about 10253.6929444957. The cubic root of 105138219 is about 471.9763151837.

The spelling of 105138219 in words is "one hundred five million, one hundred thirty-eight thousand, two hundred nineteen".