320982381 has 6 divisors (see below), whose sum is σ = 463641230. Its totient is φ = 213988248.

The previous prime is 320982377. The next prime is 320982391. The reversal of 320982381 is 183289023.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 199233225 + 121749156 = 14115^2 + 11034^2 .

It is not a de Polignac number, because 320982381 - 2² = 320982377 is a prime.

It is a super-2 number, since 2×320982381² = 206059377824858322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320982341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17832346 + ... + 17832363.

Almost surely, 2^320982381 is an apocalyptic number.

It is an amenable number.

320982381 is a deficient number, since it is larger than the sum of its proper divisors (142658849).

320982381 is a wasteful number, since it uses less digits than its factorization.

320982381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35664715 (or 35664712 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 320982381 is about 17915.9811620798. The cubic root of 320982381 is about 684.6896002520.

The spelling of 320982381 in words is "three hundred twenty million, nine hundred eighty-two thousand, three hundred eighty-one".