320331213409 has 2 divisors, whose sum is σ = 320331213410. Its totient is φ = 320331213408.

The previous prime is 320331213407. The next prime is 320331213437. The reversal of 320331213409 is 904312133023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288103783009 + 32227430400 = 536753^2 + 179520^2 .

It is a cyclic number.

It is not a de Polignac number, because 320331213409 - 2¹ = 320331213407 is a prime.

It is a super-2 number, since 2×320331213409² (a number of 24 digits) contains 22 as substring.

Together with 320331213407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (320331213407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160165606704 + 160165606705.

It is an arithmetic number, because the mean of its divisors is an integer number (160165606705).

Almost surely, 2^320331213409 is an apocalyptic number.

It is an amenable number.

320331213409 is a deficient number, since it is larger than the sum of its proper divisors (1).

320331213409 is an equidigital number, since it uses as much as digits as its factorization.

320331213409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

The spelling of 320331213409 in words is "three hundred twenty billion, three hundred thirty-one million, two hundred thirteen thousand, four hundred nine".