205236713 has 4 divisors (see below), whose sum is σ = 223894608. Its totient is φ = 186578820.

The previous prime is 205236679. The next prime is 205236737. The reversal of 205236713 is 317632502.

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 205236713 - 2²⁰ = 204188137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205236763) 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, 9328931 + ... + 9328952.

It is an arithmetic number, because the mean of its divisors is an integer number (55973652).

Almost surely, 2^205236713 is an apocalyptic number.

It is an amenable number.

205236713 is a deficient number, since it is larger than the sum of its proper divisors (18657895).

205236713 is a wasteful number, since it uses less digits than its factorization.

205236713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18657894.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 205236713 is about 14326.0850548920. The cubic root of 205236713 is about 589.8637174456.

The spelling of 205236713 in words is "two hundred five million, two hundred thirty-six thousand, seven hundred thirteen".