105172111507 has 4 divisors (see below), whose sum is σ = 105217980400. Its totient is φ = 105126242616.

The previous prime is 105172111489. The next prime is 105172111511. The reversal of 105172111507 is 705111271501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105172111507 - 2¹⁹ = 105171587219 is a prime.

It is a super-2 number, since 2×105172111507² (a number of 23 digits) contains 22 as substring.

It is the 324303-rd Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105172111007) by changing a digit.

It is a nontrivial repunit in base 324302.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22931007 + ... + 22935592.

It is an arithmetic number, because the mean of its divisors is an integer number (26304495100).

Almost surely, 2^105172111507 is an apocalyptic number.

105172111507 is a deficient number, since it is larger than the sum of its proper divisors (45868893).

105172111507 is an equidigital number, since it uses as much as digits as its factorization.

105172111507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45868892.

The product of its (nonzero) digits is 2450, while the sum is 31.

The spelling of 105172111507 in words is "one hundred five billion, one hundred seventy-two million, one hundred eleven thousand, five hundred seven".