321240233 has 2 divisors, whose sum is σ = 321240234. Its totient is φ = 321240232.

The previous prime is 321240209. The next prime is 321240263. The reversal of 321240233 is 332042123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191462569 + 129777664 = 13837^2 + 11392^2 .

It is a cyclic number.

It is not a de Polignac number, because 321240233 - 2¹⁰ = 321239209 is a prime.

It is not a weakly prime, because it can be changed into another prime (321240263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160620116 + 160620117.

It is an arithmetic number, because the mean of its divisors is an integer number (160620117).

Almost surely, 2^321240233 is an apocalyptic number.

It is an amenable number.

321240233 is a deficient number, since it is larger than the sum of its proper divisors (1).

321240233 is an equidigital number, since it uses as much as digits as its factorization.

321240233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 321240233 is about 17923.1758625529. The cubic root of 321240233 is about 684.8728931047.

Adding to 321240233 its reverse (332042123), we get a palindrome (653282356).

The spelling of 321240233 in words is "three hundred twenty-one million, two hundred forty thousand, two hundred thirty-three".