321130231 has 4 divisors (see below), whose sum is σ = 325653264. Its totient is φ = 316607200.

The previous prime is 321130223. The next prime is 321130259. The reversal of 321130231 is 132031123.

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 321130231 - 2³ = 321130223 is a prime.

It is a super-2 number, since 2×321130231² = 206249250524226722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321130261) 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, 2261410 + ... + 2261551.

It is an arithmetic number, because the mean of its divisors is an integer number (81413316).

Almost surely, 2^321130231 is an apocalyptic number.

321130231 is a deficient number, since it is larger than the sum of its proper divisors (4523033).

321130231 is an equidigital number, since it uses as much as digits as its factorization.

321130231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4523032.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321130231 is about 17920.1068914223. The cubic root of 321130231 is about 684.7947107133.

Adding to 321130231 its reverse (132031123), we get a palindrome (453161354).

The spelling of 321130231 in words is "three hundred twenty-one million, one hundred thirty thousand, two hundred thirty-one".