204431211242331 has 4 divisors (see below), whose sum is σ = 272574948323112. Its totient is φ = 136287474161552.

The previous prime is 204431211242299. The next prime is 204431211242381. The reversal of 204431211242331 is 133242112134402.

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 204431211242331 - 2⁵ = 204431211242299 is a prime.

It is a super-2 number, since 2×204431211242331² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204431211242292 and 204431211242301.

It is not an unprimeable number, because it can be changed into a prime (204431211242381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34071868540386 + ... + 34071868540391.

It is an arithmetic number, because the mean of its divisors is an integer number (68143737080778).

Almost surely, 2^{204431211242331} is an apocalyptic number.

204431211242331 is a deficient number, since it is larger than the sum of its proper divisors (68143737080781).

204431211242331 is an equidigital number, since it uses as much as digits as its factorization.

204431211242331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68143737080780.

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 204431211242331 its reverse (133242112134402), we get a palindrome (337673323376733).

The spelling of 204431211242331 in words is "two hundred four trillion, four hundred thirty-one billion, two hundred eleven million, two hundred forty-two thousand, three hundred thirty-one".