321152213 has 2 divisors, whose sum is σ = 321152214. Its totient is φ = 321152212.

The previous prime is 321152191. The next prime is 321152233. The reversal of 321152213 is 312251123.

It is an a-pointer prime, because the next prime (321152233) can be obtained adding 321152213 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179613604 + 141538609 = 13402^2 + 11897^2 .

It is a cyclic number.

It is not a de Polignac number, because 321152213 - 2²⁸ = 52716757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321152233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160576106 + 160576107.

It is an arithmetic number, because the mean of its divisors is an integer number (160576107).

Almost surely, 2^321152213 is an apocalyptic number.

It is an amenable number.

321152213 is a deficient number, since it is larger than the sum of its proper divisors (1).

321152213 is an equidigital number, since it uses as much as digits as its factorization.

321152213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 321152213 is about 17920.7202143217. The cubic root of 321152213 is about 684.8103355413.

The spelling of 321152213 in words is "three hundred twenty-one million, one hundred fifty-two thousand, two hundred thirteen".