204422381 has 4 divisors (see below), whose sum is σ = 204648672. Its totient is φ = 204196092.

The previous prime is 204422377. The next prime is 204422389. The reversal of 204422381 is 183224402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204422381 - 2² = 204422377 is a prime.

It is a super-2 number, since 2×204422381² = 83577019707418322, which 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 204422381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204422389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111785 + ... + 113598.

It is an arithmetic number, because the mean of its divisors is an integer number (51162168).

Almost surely, 2^204422381 is an apocalyptic number.

It is an amenable number.

204422381 is a deficient number, since it is larger than the sum of its proper divisors (226291).

204422381 is an equidigital number, since it uses as much as digits as its factorization.

204422381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226290.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 204422381 is about 14297.6355038167. The cubic root of 204422381 is about 589.0825355652.

Adding to 204422381 its reverse (183224402), we get a palindrome (387646783).

The spelling of 204422381 in words is "two hundred four million, four hundred twenty-two thousand, three hundred eighty-one".