105500231 has 4 divisors (see below), whose sum is σ = 109138200. Its totient is φ = 101862264.

The previous prime is 105500203. The next prime is 105500233. The reversal of 105500231 is 132005501.

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-105500231 is a prime.

It is a super-2 number, since 2×105500231² = 22260597482106722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105500233) 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, 1818941 + ... + 1818998.

It is an arithmetic number, because the mean of its divisors is an integer number (27284550).

Almost surely, 2^105500231 is an apocalyptic number.

105500231 is a deficient number, since it is larger than the sum of its proper divisors (3637969).

105500231 is an equidigital number, since it uses as much as digits as its factorization.

105500231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3637968.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 105500231 is about 10271.3305369850. The cubic root of 105500231 is about 472.5173977152.

Adding to 105500231 its reverse (132005501), we get a palindrome (237505732).

The spelling of 105500231 in words is "one hundred five million, five hundred thousand, two hundred thirty-one".