321321353 has 2 divisors, whose sum is σ = 321321354. Its totient is φ = 321321352.

The previous prime is 321321277. The next prime is 321321359. The reversal of 321321353 is 353123123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229007689 + 92313664 = 15133^2 + 9608^2 .

It is an emirp because it is prime and its reverse (353123123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321321353 - 2¹⁴ = 321304969 is a prime.

It is not a weakly prime, because it can be changed into another prime (321321359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160660676 + 160660677.

It is an arithmetic number, because the mean of its divisors is an integer number (160660677).

Almost surely, 2^321321353 is an apocalyptic number.

It is an amenable number.

321321353 is a deficient number, since it is larger than the sum of its proper divisors (1).

321321353 is an equidigital number, since it uses as much as digits as its factorization.

321321353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 23.

The square root of 321321353 is about 17925.4387115072. The cubic root of 321321353 is about 684.9305365831.

Adding to 321321353 its reverse (353123123), we get a palindrome (674444476).

The spelling of 321321353 in words is "three hundred twenty-one million, three hundred twenty-one thousand, three hundred fifty-three".