231241321 has 4 divisors (see below), whose sum is σ = 234692752. Its totient is φ = 227789892.

The previous prime is 231241291. The next prime is 231241337. The reversal of 231241321 is 123142132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231241321 - 2⁷ = 231241193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231245321) 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, 1725615 + ... + 1725748.

It is an arithmetic number, because the mean of its divisors is an integer number (58673188).

Almost surely, 2^231241321 is an apocalyptic number.

It is an amenable number.

231241321 is a deficient number, since it is larger than the sum of its proper divisors (3451431).

231241321 is an equidigital number, since it uses as much as digits as its factorization.

231241321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3451430.

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

The square root of 231241321 is about 15206.6209593059. The cubic root of 231241321 is about 613.7928341897.

Adding to 231241321 its reverse (123142132), we get a palindrome (354383453).

The spelling of 231241321 in words is "two hundred thirty-one million, two hundred forty-one thousand, three hundred twenty-one".