105643051 has 4 divisors (see below), whose sum is σ = 106016632. Its totient is φ = 105269472.

The previous prime is 105643039. The next prime is 105643067. The reversal of 105643051 is 150346501.

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 105643051 - 2⁷ = 105642923 is a prime.

It is a super-2 number, since 2×105643051² = 22320908449177202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105643001) 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, 186366 + ... + 186931.

It is an arithmetic number, because the mean of its divisors is an integer number (26504158).

Almost surely, 2^105643051 is an apocalyptic number.

105643051 is a deficient number, since it is larger than the sum of its proper divisors (373581).

105643051 is an equidigital number, since it uses as much as digits as its factorization.

105643051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373580.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 105643051 is about 10278.2805468619. The cubic root of 105643051 is about 472.7305236474.

Adding to 105643051 its reverse (150346501), we get a palindrome (255989552).

The spelling of 105643051 in words is "one hundred five million, six hundred forty-three thousand, fifty-one".