205121353 has 4 divisors (see below), whose sum is σ = 205407360. Its totient is φ = 204835348.

The previous prime is 205121333. The next prime is 205121363. The reversal of 205121353 is 353121502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205121353 - 2¹⁷ = 204990281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205121333) 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, 141925 + ... + 143362.

It is an arithmetic number, because the mean of its divisors is an integer number (51351840).

Almost surely, 2^205121353 is an apocalyptic number.

It is an amenable number.

205121353 is a deficient number, since it is larger than the sum of its proper divisors (286007).

205121353 is an equidigital number, since it uses as much as digits as its factorization.

205121353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286006.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 205121353 is about 14322.0582668833. The cubic root of 205121353 is about 589.7531793411.

Adding to 205121353 its reverse (353121502), we get a palindrome (558242855).

The spelling of 205121353 in words is "two hundred five million, one hundred twenty-one thousand, three hundred fifty-three".