205125313 has 4 divisors (see below), whose sum is σ = 207042480. Its totient is φ = 203208148.

The previous prime is 205125301. The next prime is 205125353. The reversal of 205125313 is 313521502.

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 205125313 - 2¹⁷ = 204994241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205125353) 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, 958423 + ... + 958636.

It is an arithmetic number, because the mean of its divisors is an integer number (51760620).

Almost surely, 2^205125313 is an apocalyptic number.

It is an amenable number.

205125313 is a deficient number, since it is larger than the sum of its proper divisors (1917167).

205125313 is a wasteful number, since it uses less digits than its factorization.

205125313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917166.

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

The square root of 205125313 is about 14322.1965145015. The cubic root of 205125313 is about 589.7569745051.

Adding to 205125313 its reverse (313521502), we get a palindrome (518646815).

The spelling of 205125313 in words is "two hundred five million, one hundred twenty-five thousand, three hundred thirteen".