231354220143 has 32 divisors (see below), whose sum is σ = 319723252992. Its totient is φ = 148712256000.

The previous prime is 231354220133. The next prime is 231354220193. The reversal of 231354220143 is 341022453132.

It is not a de Polignac number, because 231354220143 - 2⁶ = 231354220079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231354220143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231354220133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4364428 + ... + 4417118.

It is an arithmetic number, because the mean of its divisors is an integer number (9991351656).

Almost surely, 2^231354220143 is an apocalyptic number.

231354220143 is a deficient number, since it is larger than the sum of its proper divisors (88369032849).

231354220143 is a wasteful number, since it uses less digits than its factorization.

231354220143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53175.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 231354220143 its reverse (341022453132), we get a palindrome (572376673275).

The spelling of 231354220143 in words is "two hundred thirty-one billion, three hundred fifty-four million, two hundred twenty thousand, one hundred forty-three".