10531310191 has 4 divisors (see below), whose sum is σ = 10531522800. Its totient is φ = 10531097584.

The previous prime is 10531310189. The next prime is 10531310203. The reversal of 10531310191 is 19101313501.

It is a happy number.

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 10531310191 - 2¹ = 10531310189 is a prime.

It is a super-2 number, since 2×10531310191² (a number of 21 digits) 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 (10531310131) 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, 11550 + ... + 145588.

It is an arithmetic number, because the mean of its divisors is an integer number (2632880700).

Almost surely, 2^10531310191 is an apocalyptic number.

10531310191 is a deficient number, since it is larger than the sum of its proper divisors (212609).

10531310191 is an equidigital number, since it uses as much as digits as its factorization.

10531310191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212608.

The product of its (nonzero) digits is 405, while the sum is 25.

Adding to 10531310191 its reverse (19101313501), we get a palindrome (29632623692).

The spelling of 10531310191 in words is "ten billion, five hundred thirty-one million, three hundred ten thousand, one hundred ninety-one".