204221234440 has 32 divisors (see below), whose sum is σ = 459525908160. Its totient is φ = 81683492800.

The previous prime is 204221234431. The next prime is 204221234489. The reversal of 204221234440 is 44432122402.

It is a super-2 number, since 2×204221234440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204221234399 and 204221234408.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 544005 + ... + 839275.

It is an arithmetic number, because the mean of its divisors is an integer number (14360184630).

Almost surely, 2^204221234440 is an apocalyptic number.

204221234440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204221234440 is an abundant number, since it is smaller than the sum of its proper divisors (255304673720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204221234440 is a wasteful number, since it uses less digits than its factorization.

204221234440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312573 (or 312569 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 204221234440 its reverse (44432122402), we get a palindrome (248653356842).

The spelling of 204221234440 in words is "two hundred four billion, two hundred twenty-one million, two hundred thirty-four thousand, four hundred forty".