204223031 has 4 divisors (see below), whose sum is σ = 204515064. Its totient is φ = 203931000.

The previous prime is 204223027. The next prime is 204223073. The reversal of 204223031 is 130322402.

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 204223031 - 2² = 204223027 is a prime.

It is a super-2 number, since 2×204223031² = 83414092781653922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204223021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144965 + ... + 146366.

It is an arithmetic number, because the mean of its divisors is an integer number (51128766).

Almost surely, 2^204223031 is an apocalyptic number.

204223031 is a deficient number, since it is larger than the sum of its proper divisors (292033).

204223031 is an equidigital number, since it uses as much as digits as its factorization.

204223031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292032.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 204223031 is about 14290.6623709330. The cubic root of 204223031 is about 588.8909847888.

Adding to 204223031 its reverse (130322402), we get a palindrome (334545433).

The spelling of 204223031 in words is "two hundred four million, two hundred twenty-three thousand, thirty-one".