321313133 has 2 divisors, whose sum is σ = 321313134. Its totient is φ = 321313132.

The previous prime is 321313129. The next prime is 321313147. The reversal of 321313133 is 331313123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209757289 + 111555844 = 14483^2 + 10562^2 .

It is a cyclic number.

It is not a de Polignac number, because 321313133 - 2² = 321313129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321313163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160656566 + 160656567.

It is an arithmetic number, because the mean of its divisors is an integer number (160656567).

Almost surely, 2^321313133 is an apocalyptic number.

It is an amenable number.

321313133 is a deficient number, since it is larger than the sum of its proper divisors (1).

321313133 is an equidigital number, since it uses as much as digits as its factorization.

321313133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 20.

The square root of 321313133 is about 17925.2094269495. The cubic root of 321313133 is about 684.9246959327.

Adding to 321313133 its reverse (331313123), we get a palindrome (652626256).

The spelling of 321313133 in words is "three hundred twenty-one million, three hundred thirteen thousand, one hundred thirty-three".