105118931 has 4 divisors (see below), whose sum is σ = 107355552. Its totient is φ = 102882312.

The previous prime is 105118927. The next prime is 105118969. The reversal of 105118931 is 139811501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139811501 = 419 ⋅333679.

It is a cyclic number.

It is not a de Polignac number, because 105118931 - 2² = 105118927 is a prime.

It is a super-2 number, since 2×105118931² = 22099979309165522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105118894 and 105118903.

It is not an unprimeable number, because it can be changed into a prime (105118991) 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, 1118240 + ... + 1118333.

It is an arithmetic number, because the mean of its divisors is an integer number (26838888).

Almost surely, 2^105118931 is an apocalyptic number.

105118931 is a deficient number, since it is larger than the sum of its proper divisors (2236621).

105118931 is an equidigital number, since it uses as much as digits as its factorization.

105118931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236620.

The product of its (nonzero) digits is 1080, while the sum is 29.

The square root of 105118931 is about 10252.7523621709. The cubic root of 105118931 is about 471.9474514778.

The spelling of 105118931 in words is "one hundred five million, one hundred eighteen thousand, nine hundred thirty-one".