231321333132 has 18 divisors (see below), whose sum is σ = 584728925508. Its totient is φ = 77107111032.

The previous prime is 231321333119. The next prime is 231321333143. The reversal of 231321333132 is 231333123132.

231321333132 is a `hidden beast` number, since 2 + 3 + 1 + 321 + 3 + 331 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 231321333096 and 231321333105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3212796258 + ... + 3212796329.

It is an arithmetic number, because the mean of its divisors is an integer number (32484940306).

Almost surely, 2^231321333132 is an apocalyptic number.

It is an amenable number.

231321333132 is an abundant number, since it is smaller than the sum of its proper divisors (353407592376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231321333132 is a wasteful number, since it uses less digits than its factorization.

231321333132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425592597 (or 6425592592 counting only the distinct ones).

The product of its digits is 5832, while the sum is 27.

Adding to 231321333132 its reverse (231333123132), we get a palindrome (462654456264).

It can be divided in two parts, 231321 and 333132, that added together give a triangular number (564453 = T₁₀₆₂).

The spelling of 231321333132 in words is "two hundred thirty-one billion, three hundred twenty-one million, three hundred thirty-three thousand, one hundred thirty-two".