205338142 has 4 divisors (see below), whose sum is σ = 308007216. Its totient is φ = 102669070.

The previous prime is 205338137. The next prime is 205338163. The reversal of 205338142 is 241833502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241833502 = 2 ⋅120916751.

It is a self number, because there is not a number n which added to its sum of digits gives 205338142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51334534 + ... + 51334537.

It is an arithmetic number, because the mean of its divisors is an integer number (77001804).

Almost surely, 2^205338142 is an apocalyptic number.

205338142 is a deficient number, since it is larger than the sum of its proper divisors (102669074).

205338142 is a wasteful number, since it uses less digits than its factorization.

205338142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102669073.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 205338142 is about 14329.6246287193. The cubic root of 205338142 is about 589.9608726327.

The spelling of 205338142 in words is "two hundred five million, three hundred thirty-eight thousand, one hundred forty-two".