204431220244442 has 4 divisors (see below), whose sum is σ = 306646830366666. Its totient is φ = 102215610122220.

The previous prime is 204431220244429. The next prime is 204431220244481. The reversal of 204431220244442 is 244442022134402.

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

It can be written as a sum of positive squares in only one way, i.e., 195404025732601 + 9027194511841 = 13978699^2 + 3004529^2 .

It is a super-4 number, since 4×204431220244442⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a junction number, because it is equal to n+sod(n) for n = 204431220244396 and 204431220244405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51107805061109 + ... + 51107805061112.

Almost surely, 2^{204431220244442} is an apocalyptic number.

204431220244442 is a deficient number, since it is larger than the sum of its proper divisors (102215610122224).

204431220244442 is a wasteful number, since it uses less digits than its factorization.

204431220244442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102215610122223.

The product of its (nonzero) digits is 393216, while the sum is 38.

Adding to 204431220244442 its reverse (244442022134402), we get a palindrome (448873242378844).

The spelling of 204431220244442 in words is "two hundred four trillion, four hundred thirty-one billion, two hundred twenty million, two hundred forty-four thousand, four hundred forty-two".