204143211231 has 4 divisors (see below), whose sum is σ = 272190948312. Its totient is φ = 136095474152.

The previous prime is 204143211227. The next prime is 204143211271. The reversal of 204143211231 is 132112341402.

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 204143211231 - 2² = 204143211227 is a prime.

It is a super-2 number, since 2×204143211231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204143211211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34023868536 + ... + 34023868541.

It is an arithmetic number, because the mean of its divisors is an integer number (68047737078).

Almost surely, 2^204143211231 is an apocalyptic number.

204143211231 is a deficient number, since it is larger than the sum of its proper divisors (68047737081).

204143211231 is an equidigital number, since it uses as much as digits as its factorization.

204143211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68047737080.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 204143211231 its reverse (132112341402), we get a palindrome (336255552633).

The spelling of 204143211231 in words is "two hundred four billion, one hundred forty-three million, two hundred eleven thousand, two hundred thirty-one".