105144231 has 4 divisors (see below), whose sum is σ = 140192312. Its totient is φ = 70096152.

The previous prime is 105144223. The next prime is 105144241. The reversal of 105144231 is 132441501.

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

It is not a de Polignac number, because 105144231 - 2³ = 105144223 is a prime.

It is a super-2 number, since 2×105144231² = 22110618625162722, 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 = 105144198 and 105144207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105144211) 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, 17524036 + ... + 17524041.

It is an arithmetic number, because the mean of its divisors is an integer number (35048078).

Almost surely, 2^105144231 is an apocalyptic number.

105144231 is a deficient number, since it is larger than the sum of its proper divisors (35048081).

105144231 is an equidigital number, since it uses as much as digits as its factorization.

105144231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35048080.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 105144231 is about 10253.9861029748. The cubic root of 105144231 is about 471.9853111751.

Adding to 105144231 its reverse (132441501), we get a palindrome (237585732).

The spelling of 105144231 in words is "one hundred five million, one hundred forty-four thousand, two hundred thirty-one".