320881 has 8 divisors (see below), whose sum is σ = 361728. Its totient is φ = 282000.

The previous prime is 320867. The next prime is 320899. The reversal of 320881 is 188023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320881 - 2¹¹ = 318833 is a prime.

It is a super-2 number, since 2×320881² = 205929232322, which contains 22 as substring.

It is a Duffinian number.

320881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (320821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130 + ... + 811.

It is an arithmetic number, because the mean of its divisors is an integer number (45216).

2³²⁰⁸⁸¹ is an apocalyptic number.

320881 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

320881 is a deficient number, since it is larger than the sum of its proper divisors (40847).

320881 is a wasteful number, since it uses less digits than its factorization.

320881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 320881 is about 566.4635910630. The cubic root of 320881 is about 68.4617507172.

The spelling of 320881 in words is "three hundred twenty thousand, eight hundred eighty-one".