320321320031 has 4 divisors (see below), whose sum is σ = 320506158072. Its totient is φ = 320136481992.

The previous prime is 320321320021. The next prime is 320321320049. The reversal of 320321320031 is 130023123023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130023123023 = 5297 ⋅24546559.

It is a cyclic number.

It is not a de Polignac number, because 320321320031 - 2¹⁰ = 320321319007 is a prime.

It is a super-2 number, since 2×320321320031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320321319985 and 320321320012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320321320021) 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, 92416421 + ... + 92419886.

It is an arithmetic number, because the mean of its divisors is an integer number (80126539518).

Almost surely, 2^320321320031 is an apocalyptic number.

320321320031 is a deficient number, since it is larger than the sum of its proper divisors (184838041).

320321320031 is a wasteful number, since it uses less digits than its factorization.

320321320031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184838040.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 320321320031 its reverse (130023123023), we get a palindrome (450344443054).

The spelling of 320321320031 in words is "three hundred twenty billion, three hundred twenty-one million, three hundred twenty thousand, thirty-one".