205523013 has 8 divisors (see below), whose sum is σ = 290150208. Its totient is φ = 128955584.

The previous prime is 205523011. The next prime is 205523033. The reversal of 205523013 is 310325502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205523013 - 2¹ = 205523011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205523011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2014881 + ... + 2014982.

It is an arithmetic number, because the mean of its divisors is an integer number (36268776).

Almost surely, 2^205523013 is an apocalyptic number.

It is an amenable number.

205523013 is a deficient number, since it is larger than the sum of its proper divisors (84627195).

205523013 is a wasteful number, since it uses less digits than its factorization.

205523013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029883.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 205523013 is about 14336.0738349103. The cubic root of 205523013 is about 590.1378716386.

Adding to 205523013 its reverse (310325502), we get a palindrome (515848515).

The spelling of 205523013 in words is "two hundred five million, five hundred twenty-three thousand, thirteen".