105240235231 has 4 divisors (see below), whose sum is σ = 110779195000. Its totient is φ = 99701275464.

The previous prime is 105240235213. The next prime is 105240235237. The reversal of 105240235231 is 132532042501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132532042501 = 317 ⋅418082153.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105240235231 is a prime.

It is a super-2 number, since 2×105240235231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105240235231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105240235237) 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, 2769479856 + ... + 2769479893.

It is an arithmetic number, because the mean of its divisors is an integer number (27694798750).

Almost surely, 2^105240235231 is an apocalyptic number.

105240235231 is a deficient number, since it is larger than the sum of its proper divisors (5538959769).

105240235231 is an equidigital number, since it uses as much as digits as its factorization.

105240235231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538959768.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 105240235231 its reverse (132532042501), we get a palindrome (237772277732).

The spelling of 105240235231 in words is "one hundred five billion, two hundred forty million, two hundred thirty-five thousand, two hundred thirty-one".