105915971 has 4 divisors (see below), whose sum is σ = 121046832. Its totient is φ = 90785112.

The previous prime is 105915913. The next prime is 105915977. The reversal of 105915971 is 179519501.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105915971 is a prime.

It is a super-2 number, since 2×105915971² = 22436385825745682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105915977) 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, 7565420 + ... + 7565433.

It is an arithmetic number, because the mean of its divisors is an integer number (30261708).

Almost surely, 2^105915971 is an apocalyptic number.

105915971 is a deficient number, since it is larger than the sum of its proper divisors (15130861).

105915971 is an equidigital number, since it uses as much as digits as its factorization.

105915971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15130860.

The product of its (nonzero) digits is 14175, while the sum is 38.

The square root of 105915971 is about 10291.5485229386. The cubic root of 105915971 is about 473.1372602016.

The spelling of 105915971 in words is "one hundred five million, nine hundred fifteen thousand, nine hundred seventy-one".