231214321 has 4 divisors (see below), whose sum is σ = 249000052. Its totient is φ = 213428592.

The previous prime is 231214307. The next prime is 231214343. The reversal of 231214321 is 123412132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15124321 + 216090000 = 3889^2 + 14700^2 .

It is not a de Polignac number, because 231214321 - 2⁵ = 231214289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231214381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8892846 + ... + 8892871.

It is an arithmetic number, because the mean of its divisors is an integer number (62250013).

Almost surely, 2^231214321 is an apocalyptic number.

It is an amenable number.

231214321 is a deficient number, since it is larger than the sum of its proper divisors (17785731).

231214321 is a wasteful number, since it uses less digits than its factorization.

231214321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17785730.

The product of its digits is 288, while the sum is 19.

The square root of 231214321 is about 15205.7331621991. The cubic root of 231214321 is about 613.7689442097.

Adding to 231214321 its reverse (123412132), we get a palindrome (354626453).

The spelling of 231214321 in words is "two hundred thirty-one million, two hundred fourteen thousand, three hundred twenty-one".