204421331 has 2 divisors, whose sum is σ = 204421332. Its totient is φ = 204421330.

The previous prime is 204421313. The next prime is 204421333. The reversal of 204421331 is 133124402.

Together with previous prime (204421313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204421331 - 2¹⁴ = 204404947 is a prime.

It is a super-2 number, since 2×204421331² = 83576161135623122, which contains 22 as substring.

Together with 204421333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204421333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102210665 + 102210666.

It is an arithmetic number, because the mean of its divisors is an integer number (102210666).

Almost surely, 2^204421331 is an apocalyptic number.

204421331 is a deficient number, since it is larger than the sum of its proper divisors (1).

204421331 is an equidigital number, since it uses as much as digits as its factorization.

204421331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 204421331 is about 14297.5987844113. The cubic root of 204421331 is about 589.0815269709.

Adding to 204421331 its reverse (133124402), we get a palindrome (337545733).

The spelling of 204421331 in words is "two hundred four million, four hundred twenty-one thousand, three hundred thirty-one".