320203031231 has 16 divisors (see below), whose sum is σ = 326956500000. Its totient is φ = 313476753408.

The previous prime is 320203031227. The next prime is 320203031257. The reversal of 320203031231 is 132130302023.

It is a cyclic number.

It is not a de Polignac number, because 320203031231 - 2² = 320203031227 is a prime.

It is a super-2 number, since 2×320203031231² (a number of 24 digits) 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 (320203031431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54741995 + ... + 54747843.

It is an arithmetic number, because the mean of its divisors is an integer number (20434781250).

Almost surely, 2^320203031231 is an apocalyptic number.

320203031231 is a deficient number, since it is larger than the sum of its proper divisors (6753468769).

320203031231 is a wasteful number, since it uses less digits than its factorization.

320203031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7978.

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

Adding to 320203031231 its reverse (132130302023), we get a palindrome (452333333254).

The spelling of 320203031231 in words is "three hundred twenty billion, two hundred three million, thirty-one thousand, two hundred thirty-one".