205252013 has 4 divisors (see below), whose sum is σ = 206148540. Its totient is φ = 204355488.

The previous prime is 205251997. The next prime is 205252031. The reversal of 205252013 is 310252502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 193404649 + 11847364 = 13907^2 + 3442^2 .

It is a cyclic number.

It is not a de Polignac number, because 205252013 - 2⁴ = 205251997 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 (205252063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447920 + ... + 448377.

It is an arithmetic number, because the mean of its divisors is an integer number (51537135).

Almost surely, 2^205252013 is an apocalyptic number.

It is an amenable number.

205252013 is a deficient number, since it is larger than the sum of its proper divisors (896527).

205252013 is an equidigital number, since it uses as much as digits as its factorization.

205252013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896526.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 205252013 is about 14326.6190359066. The cubic root of 205252013 is about 589.8783748145.

The spelling of 205252013 in words is "two hundred five million, two hundred fifty-two thousand, thirteen".