204430404131 has 4 divisors (see below), whose sum is σ = 204763896432. Its totient is φ = 204096911832.

The previous prime is 204430404121. The next prime is 204430404193. The reversal of 204430404131 is 131404034402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131404034402 = 2 ⋅65702017201.

It is a cyclic number.

It is not a de Polignac number, because 204430404131 - 2¹⁸ = 204430141987 is a prime.

It is a super-2 number, since 2×204430404131² (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 204430404131.

It is not an unprimeable number, because it can be changed into a prime (204430404121) 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, 166745231 + ... + 166746456.

It is an arithmetic number, because the mean of its divisors is an integer number (51190974108).

Almost surely, 2^204430404131 is an apocalyptic number.

204430404131 is a deficient number, since it is larger than the sum of its proper divisors (333492301).

204430404131 is an equidigital number, since it uses as much as digits as its factorization.

204430404131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333492300.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 204430404131 its reverse (131404034402), we get a palindrome (335834438533).

The spelling of 204430404131 in words is "two hundred four billion, four hundred thirty million, four hundred four thousand, one hundred thirty-one".