220204431 has 6 divisors (see below), whose sum is σ = 318073080. Its totient is φ = 146802948.

The previous prime is 220204409. The next prime is 220204459. The reversal of 220204431 is 134402022.

220204431 is a `hidden beast` number, since 220 + 2 + 0 + 443 + 1 = 666.

It is not a de Polignac number, because 220204431 - 2¹⁸ = 219942287 is a prime.

It is a super-2 number, since 2×220204431² = 96979982864067522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220204331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12233571 + ... + 12233588.

It is an arithmetic number, because the mean of its divisors is an integer number (53012180).

Almost surely, 2^220204431 is an apocalyptic number.

220204431 is a deficient number, since it is larger than the sum of its proper divisors (97868649).

220204431 is a wasteful number, since it uses less digits than its factorization.

220204431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24467165 (or 24467162 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 220204431 is about 14839.2867416194. The cubic root of 220204431 is about 603.8680023456.

Adding to 220204431 its reverse (134402022), we get a palindrome (354606453).

The spelling of 220204431 in words is "two hundred twenty million, two hundred four thousand, four hundred thirty-one".