321352261 has 2 divisors, whose sum is σ = 321352262. Its totient is φ = 321352260.

The previous prime is 321352243. The next prime is 321352271. The reversal of 321352261 is 162253123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264062500 + 57289761 = 16250^2 + 7569^2 .

It is a cyclic number.

It is not a de Polignac number, because 321352261 - 2⁹ = 321351749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321352271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160676130 + 160676131.

It is an arithmetic number, because the mean of its divisors is an integer number (160676131).

Almost surely, 2^321352261 is an apocalyptic number.

It is an amenable number.

321352261 is a deficient number, since it is larger than the sum of its proper divisors (1).

321352261 is an equidigital number, since it uses as much as digits as its factorization.

321352261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 321352261 is about 17926.3008175139. The cubic root of 321352261 is about 684.9524971055.

The spelling of 321352261 in words is "three hundred twenty-one million, three hundred fifty-two thousand, two hundred sixty-one".