231143111351 has 4 divisors (see below), whose sum is σ = 234068973600. Its totient is φ = 228217249104.

The previous prime is 231143111317. The next prime is 231143111389. The reversal of 231143111351 is 153111341132.

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 231143111351 - 2¹⁴ = 231143094967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231143111351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231149111351) 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, 1462931006 + ... + 1462931163.

It is an arithmetic number, because the mean of its divisors is an integer number (58517243400).

Almost surely, 2^231143111351 is an apocalyptic number.

231143111351 is a deficient number, since it is larger than the sum of its proper divisors (2925862249).

231143111351 is an equidigital number, since it uses as much as digits as its factorization.

231143111351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925862248.

The product of its digits is 1080, while the sum is 26.

Adding to 231143111351 its reverse (153111341132), we get a palindrome (384254452483).

The spelling of 231143111351 in words is "two hundred thirty-one billion, one hundred forty-three million, one hundred eleven thousand, three hundred fifty-one".