320441402381 has 2 divisors, whose sum is σ = 320441402382. Its totient is φ = 320441402380.

The previous prime is 320441402261. The next prime is 320441402387. The reversal of 320441402381 is 183204144023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319863769225 + 577633156 = 565565^2 + 24034^2 .

It is a cyclic number.

It is not a de Polignac number, because 320441402381 - 2¹⁴ = 320441385997 is a prime.

It is a super-2 number, since 2×320441402381² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320441402387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160220701190 + 160220701191.

It is an arithmetic number, because the mean of its divisors is an integer number (160220701191).

Almost surely, 2^320441402381 is an apocalyptic number.

It is an amenable number.

320441402381 is a deficient number, since it is larger than the sum of its proper divisors (1).

320441402381 is an equidigital number, since it uses as much as digits as its factorization.

320441402381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 320441402381 in words is "three hundred twenty billion, four hundred forty-one million, four hundred two thousand, three hundred eighty-one".