231321129 has 8 divisors (see below), whose sum is σ = 332153472. Its totient is φ = 142351440.

The previous prime is 231321127. The next prime is 231321137. The reversal of 231321129 is 921123132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231321129 - 2¹ = 231321127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231321099 and 231321108.

It is not an unprimeable number, because it can be changed into a prime (231321121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2965617 + ... + 2965694.

It is an arithmetic number, because the mean of its divisors is an integer number (41519184).

Almost surely, 2^231321129 is an apocalyptic number.

It is an amenable number.

231321129 is a deficient number, since it is larger than the sum of its proper divisors (100832343).

231321129 is a wasteful number, since it uses less digits than its factorization.

231321129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5931327.

The product of its digits is 648, while the sum is 24.

The square root of 231321129 is about 15209.2448530491. The cubic root of 231321129 is about 613.8634385608.

The spelling of 231321129 in words is "two hundred thirty-one million, three hundred twenty-one thousand, one hundred twenty-nine".