204444005131 has 4 divisors (see below), whose sum is σ = 204470484952. Its totient is φ = 204417525312.

The previous prime is 204444005123. The next prime is 204444005173. The reversal of 204444005131 is 131500444402.

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 204444005131 - 2³ = 204444005123 is a prime.

It is a super-2 number, since 2×204444005131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204444005131.

It is not an unprimeable number, because it can be changed into a prime (204444005231) 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, 13228326 + ... + 13243771.

It is an arithmetic number, because the mean of its divisors is an integer number (51117621238).

Almost surely, 2^204444005131 is an apocalyptic number.

204444005131 is a deficient number, since it is larger than the sum of its proper divisors (26479821).

204444005131 is an equidigital number, since it uses as much as digits as its factorization.

204444005131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26479820.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 204444005131 its reverse (131500444402), we get a palindrome (335944449533).

The spelling of 204444005131 in words is "two hundred four billion, four hundred forty-four million, five thousand, one hundred thirty-one".