231330030143 has 4 divisors (see below), whose sum is σ = 231660030888. Its totient is φ = 231000029400.

The previous prime is 231330030133. The next prime is 231330030199. The reversal of 231330030143 is 341030033132.

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-231330030143 is a prime.

It is a super-2 number, since 2×231330030143² (a number of 24 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 (231330030133) 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, 164999321 + ... + 165000722.

It is an arithmetic number, because the mean of its divisors is an integer number (57915007722).

Almost surely, 2^231330030143 is an apocalyptic number.

231330030143 is a deficient number, since it is larger than the sum of its proper divisors (330000745).

231330030143 is an equidigital number, since it uses as much as digits as its factorization.

231330030143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330000744.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 231330030143 its reverse (341030033132), we get a palindrome (572360063275).

The spelling of 231330030143 in words is "two hundred thirty-one billion, three hundred thirty million, thirty thousand, one hundred forty-three".