320185820231 has 4 divisors (see below), whose sum is σ = 325612698600. Its totient is φ = 314758941864.

The previous prime is 320185820189. The next prime is 320185820239. The reversal of 320185820231 is 132028581023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132028581023 = 17 ⋅7766387119.

It is a cyclic number.

It is not a de Polignac number, because 320185820231 - 2¹⁰ = 320185819207 is a prime.

It is a super-2 number, since 2×320185820231² (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 = 320185820191 and 320185820200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320185820239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2713439096 + ... + 2713439213.

It is an arithmetic number, because the mean of its divisors is an integer number (81403174650).

Almost surely, 2^320185820231 is an apocalyptic number.

320185820231 is a deficient number, since it is larger than the sum of its proper divisors (5426878369).

320185820231 is an equidigital number, since it uses as much as digits as its factorization.

320185820231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5426878368.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 320185820231 in words is "three hundred twenty billion, one hundred eighty-five million, eight hundred twenty thousand, two hundred thirty-one".