320011331 has 4 divisors (see below), whose sum is σ = 321635952. Its totient is φ = 318386712.

The previous prime is 320011327. The next prime is 320011333. The reversal of 320011331 is 133110023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133110023 = 79 ⋅1684937.

It is a cyclic number.

It is not a de Polignac number, because 320011331 - 2² = 320011327 is a prime.

It is a super-3 number, since 3×320011331³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320011333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812015 + ... + 812408.

It is an arithmetic number, because the mean of its divisors is an integer number (80408988).

Almost surely, 2^320011331 is an apocalyptic number.

320011331 is a deficient number, since it is larger than the sum of its proper divisors (1624621).

320011331 is a wasteful number, since it uses less digits than its factorization.

320011331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624620.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 320011331 is about 17888.8605282729. The cubic root of 320011331 is about 683.9984517993.

Adding to 320011331 its reverse (133110023), we get a palindrome (453121354).

The spelling of 320011331 in words is "three hundred twenty million, eleven thousand, three hundred thirty-one".