231231040144321 has 16 divisors (see below), whose sum is σ = 264617424060160. Its totient is φ = 197933108103360.

The previous prime is 231231040144301. The next prime is 231231040144393. The reversal of 231231040144321 is 123441040132132.

It is a happy number.

It is not a de Polignac number, because 231231040144321 - 2⁴¹ = 229032016888769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231231040144301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21397495 + ... + 30336691.

It is an arithmetic number, because the mean of its divisors is an integer number (16538589003760).

Almost surely, 2^{231231040144321} is an apocalyptic number.

It is an amenable number.

231231040144321 is a deficient number, since it is larger than the sum of its proper divisors (33386383915839).

231231040144321 is an equidigital number, since it uses as much as digits as its factorization.

231231040144321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8944144.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 231231040144321 its reverse (123441040132132), we get a palindrome (354672080276453).

The spelling of 231231040144321 in words is "two hundred thirty-one trillion, two hundred thirty-one billion, forty million, one hundred forty-four thousand, three hundred twenty-one".