231303143111 has 4 divisors (see below), whose sum is σ = 234471679392. Its totient is φ = 228134606832.

The previous prime is 231303143107. The next prime is 231303143117. The reversal of 231303143111 is 111341303132.

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 231303143111 - 2² = 231303143107 is a prime.

It is a super-2 number, since 2×231303143111² (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 (231303143117) 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, 1584268031 + ... + 1584268176.

It is an arithmetic number, because the mean of its divisors is an integer number (58617919848).

Almost surely, 2^231303143111 is an apocalyptic number.

231303143111 is a deficient number, since it is larger than the sum of its proper divisors (3168536281).

231303143111 is an equidigital number, since it uses as much as digits as its factorization.

231303143111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168536280.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 231303143111 its reverse (111341303132), we get a palindrome (342644446243).

The spelling of 231303143111 in words is "two hundred thirty-one billion, three hundred three million, one hundred forty-three thousand, one hundred eleven".