231401321 has 8 divisors (see below), whose sum is σ = 243086400. Its totient is φ = 219851632.

The previous prime is 231401279. The next prime is 231401333. The reversal of 231401321 is 123104132.

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

It is a cyclic number.

It is not a de Polignac number, because 231401321 - 2¹⁸ = 231139177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 231401321.

It is not an unprimeable number, because it can be changed into a prime (231401341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30335 + ... + 37188.

It is an arithmetic number, because the mean of its divisors is an integer number (30385800).

Almost surely, 2^231401321 is an apocalyptic number.

It is an amenable number.

231401321 is a deficient number, since it is larger than the sum of its proper divisors (11685079).

231401321 is a wasteful number, since it uses less digits than its factorization.

231401321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67695.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231401321 is about 15211.8809159157. The cubic root of 231401321 is about 613.9343662933.

Adding to 231401321 its reverse (123104132), we get a palindrome (354505453).

The spelling of 231401321 in words is "two hundred thirty-one million, four hundred one thousand, three hundred twenty-one".