105431532243 has 4 divisors (see below), whose sum is σ = 140575376328. Its totient is φ = 70287688160.

The previous prime is 105431532211. The next prime is 105431532293. The reversal of 105431532243 is 342235134501.

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 105431532243 - 2⁵ = 105431532211 is a prime.

It is a super-2 number, since 2×105431532243² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105431532293) 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, 17571922038 + ... + 17571922043.

It is an arithmetic number, because the mean of its divisors is an integer number (35143844082).

Almost surely, 2^105431532243 is an apocalyptic number.

105431532243 is a deficient number, since it is larger than the sum of its proper divisors (35143844085).

105431532243 is an equidigital number, since it uses as much as digits as its factorization.

105431532243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35143844084.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 105431532243 its reverse (342235134501), we get a palindrome (447666666744).

The spelling of 105431532243 in words is "one hundred five billion, four hundred thirty-one million, five hundred thirty-two thousand, two hundred forty-three".