203320323131 has 4 divisors (see below), whose sum is σ = 209879043264. Its totient is φ = 196761603000.

The previous prime is 203320323109. The next prime is 203320323149. The reversal of 203320323131 is 131323023302.

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 203320323131 - 2¹⁴ = 203320306747 is a prime.

It is a super-2 number, since 2×203320323131² (a number of 23 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 = 203320323097 and 203320323106.

It is not an unprimeable number, because it can be changed into a prime (203320328131) 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, 3279360020 + ... + 3279360081.

It is an arithmetic number, because the mean of its divisors is an integer number (52469760816).

Almost surely, 2^203320323131 is an apocalyptic number.

203320323131 is a deficient number, since it is larger than the sum of its proper divisors (6558720133).

203320323131 is an equidigital number, since it uses as much as digits as its factorization.

203320323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6558720132.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 203320323131 its reverse (131323023302), we get a palindrome (334643346433).

The spelling of 203320323131 in words is "two hundred three billion, three hundred twenty million, three hundred twenty-three thousand, one hundred thirty-one".