213603305 has 8 divisors (see below), whose sum is σ = 260668800. Its totient is φ = 167986096.

The previous prime is 213603289. The next prime is 213603311. The reversal of 213603305 is 503306312.

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 213603305 - 2⁴ = 213603289 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 361745 + ... + 362334.

It is an arithmetic number, because the mean of its divisors is an integer number (32583600).

Almost surely, 2^213603305 is an apocalyptic number.

It is an amenable number.

213603305 is a deficient number, since it is larger than the sum of its proper divisors (47065495).

213603305 is an equidigital number, since it uses as much as digits as its factorization.

213603305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724143.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 213603305 is about 14615.1737930139. The cubic root of 213603305 is about 597.7725791897.

Adding to 213603305 its reverse (503306312), we get a palindrome (716909617).

The spelling of 213603305 in words is "two hundred thirteen million, six hundred three thousand, three hundred five".