320102381 has 2 divisors, whose sum is σ = 320102382. Its totient is φ = 320102380.

The previous prime is 320102353. The next prime is 320102389. The reversal of 320102381 is 183201023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319515625 + 586756 = 17875^2 + 766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320102381 is a prime.

It is a super-2 number, since 2×320102381² = 204931068643738322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320102389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160051190 + 160051191.

It is an arithmetic number, because the mean of its divisors is an integer number (160051191).

Almost surely, 2^320102381 is an apocalyptic number.

It is an amenable number.

320102381 is a deficient number, since it is larger than the sum of its proper divisors (1).

320102381 is an equidigital number, since it uses as much as digits as its factorization.

320102381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 320102381 is about 17891.4052270916. The cubic root of 320102381 is about 684.0633163291.

The spelling of 320102381 in words is "three hundred twenty million, one hundred two thousand, three hundred eighty-one".