205013251 has 4 divisors (see below), whose sum is σ = 217072872. Its totient is φ = 192953632.

The previous prime is 205013227. The next prime is 205013309. The reversal of 205013251 is 152310502.

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 205013251 - 2⁵ = 205013219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205013051) 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, 6029785 + ... + 6029818.

It is an arithmetic number, because the mean of its divisors is an integer number (54268218).

Almost surely, 2^205013251 is an apocalyptic number.

205013251 is a deficient number, since it is larger than the sum of its proper divisors (12059621).

205013251 is a wasteful number, since it uses less digits than its factorization.

205013251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12059620.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 205013251 is about 14318.2838007912. The cubic root of 205013251 is about 589.6495582403.

Adding to 205013251 its reverse (152310502), we get a palindrome (357323753).

The spelling of 205013251 in words is "two hundred five million, thirteen thousand, two hundred fifty-one".