204311312042 has 8 divisors (see below), whose sum is σ = 309626421636. Its totient is φ = 101102504832.

The previous prime is 204311312021. The next prime is 204311312047. The reversal of 204311312042 is 240213113402.

It can be written as a sum of positive squares in 2 ways, for example, as 197019689161 + 7291622881 = 443869^2 + 85391^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×204311312042² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204311311999 and 204311312017.

It is not an unprimeable number, because it can be changed into a prime (204311312047) 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, 526575353 + ... + 526575740.

Almost surely, 2^204311312042 is an apocalyptic number.

204311312042 is a deficient number, since it is larger than the sum of its proper divisors (105315109594).

204311312042 is a wasteful number, since it uses less digits than its factorization.

204311312042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053151192.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 204311312042 its reverse (240213113402), we get a palindrome (444524425444).

The spelling of 204311312042 in words is "two hundred four billion, three hundred eleven million, three hundred twelve thousand, forty-two".