204113311331 has 4 divisors (see below), whose sum is σ = 212987803152. Its totient is φ = 195238819512.

The previous prime is 204113311313. The next prime is 204113311333. The reversal of 204113311331 is 133113311402.

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 204113311331 - 2¹⁸ = 204113049187 is a prime.

It is a super-2 number, since 2×204113311331² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 8874491797 = 204113311331 / (2 + 0 + 4 + 1 + 1 + 3 + 3 + 1 + 1 + 3 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204113311297 and 204113311306.

It is not an unprimeable number, because it can be changed into a prime (204113311333) 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, 4437245876 + ... + 4437245921.

It is an arithmetic number, because the mean of its divisors is an integer number (53246950788).

Almost surely, 2^204113311331 is an apocalyptic number.

204113311331 is a deficient number, since it is larger than the sum of its proper divisors (8874491821).

204113311331 is an equidigital number, since it uses as much as digits as its factorization.

204113311331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8874491820.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 204113311331 its reverse (133113311402), we get a palindrome (337226622733).

The spelling of 204113311331 in words is "two hundred four billion, one hundred thirteen million, three hundred eleven thousand, three hundred thirty-one".