204231871 has 2 divisors, whose sum is σ = 204231872. Its totient is φ = 204231870.

The previous prime is 204231857. The next prime is 204231877. The reversal of 204231871 is 178132402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204231871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204231877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102115935 + 102115936.

It is an arithmetic number, because the mean of its divisors is an integer number (102115936).

Almost surely, 2^204231871 is an apocalyptic number.

204231871 is a deficient number, since it is larger than the sum of its proper divisors (1).

204231871 is an equidigital number, since it uses as much as digits as its factorization.

204231871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 204231871 is about 14290.9716604575. The cubic root of 204231871 is about 588.8994815797.

The spelling of 204231871 in words is "two hundred four million, two hundred thirty-one thousand, eight hundred seventy-one".