204433131 has 16 divisors (see below), whose sum is σ = 325062144. Its totient is φ = 111739584.

The previous prime is 204433123. The next prime is 204433153. The reversal of 204433131 is 131334402.

It is not a de Polignac number, because 204433131 - 2³ = 204433123 is a prime.

It is a super-2 number, since 2×204433131² = 83585810100926322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 204433098 and 204433107.

It is not an unprimeable number, because it can be changed into a prime (204433111) 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 15 ways as a sum of consecutive naturals, for example, 211146 + ... + 212111.

It is an arithmetic number, because the mean of its divisors is an integer number (20316384).

Almost surely, 2^204433131 is an apocalyptic number.

204433131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

204433131 is a deficient number, since it is larger than the sum of its proper divisors (120629013).

204433131 is a wasteful number, since it uses less digits than its factorization.

204433131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423290.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 204433131 is about 14298.0114351612. The cubic root of 204433131 is about 589.0928614506.

Adding to 204433131 its reverse (131334402), we get a palindrome (335767533).

The spelling of 204433131 in words is "two hundred four million, four hundred thirty-three thousand, one hundred thirty-one".