105643253 has 4 divisors (see below), whose sum is σ = 111857580. Its totient is φ = 99428928.

The previous prime is 105643231. The next prime is 105643283. The reversal of 105643253 is 352346501.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39025009 + 66618244 = 6247^2 + 8162^2 .

It is a cyclic number.

It is not a de Polignac number, because 105643253 - 2⁸ = 105642997 is a prime.

It is a super-2 number, since 2×105643253² = 22320993808844018, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105643283) 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, 3107138 + ... + 3107171.

It is an arithmetic number, because the mean of its divisors is an integer number (27964395).

Almost surely, 2^105643253 is an apocalyptic number.

It is an amenable number.

105643253 is a deficient number, since it is larger than the sum of its proper divisors (6214327).

105643253 is an equidigital number, since it uses as much as digits as its factorization.

105643253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6214326.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 105643253 is about 10278.2903734035. The cubic root of 105643253 is about 472.7308249498.

Adding to 105643253 its reverse (352346501), we get a palindrome (457989754).

The spelling of 105643253 in words is "one hundred five million, six hundred forty-three thousand, two hundred fifty-three".