320203001231 has 4 divisors (see below), whose sum is σ = 320205725232. Its totient is φ = 320200277232.

The previous prime is 320203001221. The next prime is 320203001257. The reversal of 320203001231 is 132100302023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320203001231 - 2¹⁰ = 320203000207 is a prime.

It is a super-2 number, since 2×320203001231² (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 (320203001221) 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, 1177331 + ... + 1423556.

It is an arithmetic number, because the mean of its divisors is an integer number (80051431308).

Almost surely, 2^320203001231 is an apocalyptic number.

320203001231 is a deficient number, since it is larger than the sum of its proper divisors (2724001).

320203001231 is a wasteful number, since it uses less digits than its factorization.

320203001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724000.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 320203001231 its reverse (132100302023), we get a palindrome (452303303254).

The spelling of 320203001231 in words is "three hundred twenty billion, two hundred three million, one thousand, two hundred thirty-one".