231484189813 has 4 divisors (see below), whose sum is σ = 231489072268. Its totient is φ = 231479307360.

The previous prime is 231484189777. The next prime is 231484189823. The reversal of 231484189813 is 318981484132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 180596951089 + 50887238724 = 424967^2 + 225582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231484189813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231484189823) 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, 2369406 + ... + 2465167.

It is an arithmetic number, because the mean of its divisors is an integer number (57872268067).

Almost surely, 2^231484189813 is an apocalyptic number.

It is an amenable number.

231484189813 is a deficient number, since it is larger than the sum of its proper divisors (4882455).

231484189813 is an equidigital number, since it uses as much as digits as its factorization.

231484189813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882454.

The product of its digits is 1327104, while the sum is 52.

The spelling of 231484189813 in words is "two hundred thirty-one billion, four hundred eighty-four million, one hundred eighty-nine thousand, eight hundred thirteen".