205343442 has 48 divisors (see below), whose sum is σ = 486300672. Its totient is φ = 62340480.

The previous prime is 205343429. The next prime is 205343477. The reversal of 205343442 is 244343502.

205343442 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1338 + ... + 20309.

It is an arithmetic number, because the mean of its divisors is an integer number (10131264).

Almost surely, 2^205343442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205343442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243150336).

205343442 is an abundant number, since it is smaller than the sum of its proper divisors (280957230).

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

205343442 is a wasteful number, since it uses less digits than its factorization.

205343442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21703 (or 21700 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 205343442 is about 14329.8095590974. The cubic root of 205343442 is about 589.9659484322.

Adding to 205343442 its reverse (244343502), we get a palindrome (449686944).

The spelling of 205343442 in words is "two hundred five million, three hundred forty-three thousand, four hundred forty-two".