105515032231 has 32 divisors (see below), whose sum is σ = 132755005440. Its totient is φ = 81770049504.

The previous prime is 105515032171. The next prime is 105515032253. The reversal of 105515032231 is 132230515501.

It is not a de Polignac number, because 105515032231 - 2²⁵ = 105481477799 is a prime.

It is a super-2 number, since 2×105515032231² (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 105515032231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105515032261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1316206 + ... + 1394068.

It is an arithmetic number, because the mean of its divisors is an integer number (4148593920).

Almost surely, 2^105515032231 is an apocalyptic number.

105515032231 is a deficient number, since it is larger than the sum of its proper divisors (27239973209).

105515032231 is a wasteful number, since it uses less digits than its factorization.

105515032231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78355.

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 105515032231 its reverse (132230515501), we get a palindrome (237745547732).

The spelling of 105515032231 in words is "one hundred five billion, five hundred fifteen million, thirty-two thousand, two hundred thirty-one".