231535011344443 has 4 divisors (see below), whose sum is σ = 235459333570680. Its totient is φ = 227610689118208.

The previous prime is 231535011344423. The next prime is 231535011344473. The reversal of 231535011344443 is 344443110535132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231535011344443 is a prime.

It is a super-2 number, since 2×231535011344443² (a number of 30 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 231535011344443.

It is not an unprimeable number, because it can be changed into a prime (231535011344423) 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, 1962161113030 + ... + 1962161113147.

It is an arithmetic number, because the mean of its divisors is an integer number (58864833392670).

Almost surely, 2^{231535011344443} is an apocalyptic number.

231535011344443 is a deficient number, since it is larger than the sum of its proper divisors (3924322226237).

231535011344443 is an equidigital number, since it uses as much as digits as its factorization.

231535011344443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924322226236.

The product of its (nonzero) digits is 1036800, while the sum is 43.

Adding to 231535011344443 its reverse (344443110535132), we get a palindrome (575978121879575).

The spelling of 231535011344443 in words is "two hundred thirty-one trillion, five hundred thirty-five billion, eleven million, three hundred forty-four thousand, four hundred forty-three".