205338143 has 4 divisors (see below), whose sum is σ = 207937440. Its totient is φ = 202738848.

The previous prime is 205338137. The next prime is 205338163. The reversal of 205338143 is 341833502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205338143 - 2¹² = 205334047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205338163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299530 + ... + 1299687.

It is an arithmetic number, because the mean of its divisors is an integer number (51984360).

Almost surely, 2^205338143 is an apocalyptic number.

205338143 is a deficient number, since it is larger than the sum of its proper divisors (2599297).

205338143 is an equidigital number, since it uses as much as digits as its factorization.

205338143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599296.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 205338143 is about 14329.6246636121. The cubic root of 205338143 is about 589.9608735904.

The spelling of 205338143 in words is "two hundred five million, three hundred thirty-eight thousand, one hundred forty-three".