205142303 has 4 divisors (see below), whose sum is σ = 205197720. Its totient is φ = 205086888.

The previous prime is 205142279. The next prime is 205142309. The reversal of 205142303 is 303241502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303241502 = 2 ⋅151620751.

It is a cyclic number.

It is not a de Polignac number, because 205142303 - 2²⁰ = 204093727 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 (205142309) 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, 21725 + ... + 29702.

It is an arithmetic number, because the mean of its divisors is an integer number (51299430).

Almost surely, 2^205142303 is an apocalyptic number.

205142303 is a deficient number, since it is larger than the sum of its proper divisors (55417).

205142303 is an equidigital number, since it uses as much as digits as its factorization.

205142303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55416.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 205142303 is about 14322.7896374973. The cubic root of 205142303 is about 589.7732567380.

Adding to 205142303 its reverse (303241502), we get a palindrome (508383805).

The spelling of 205142303 in words is "two hundred five million, one hundred forty-two thousand, three hundred three".