213241305 has 16 divisors (see below), whose sum is σ = 341732160. Its totient is φ = 113546688.

The previous prime is 213241291. The next prime is 213241337. The reversal of 213241305 is 503142312.

It is not a de Polignac number, because 213241305 - 2¹⁰ = 213240281 is a prime.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 1410 + ... + 20699.

It is an arithmetic number, because the mean of its divisors is an integer number (21358260).

Almost surely, 2^213241305 is an apocalyptic number.

It is an amenable number.

213241305 is a deficient number, since it is larger than the sum of its proper divisors (128490855).

213241305 is a wasteful number, since it uses less digits than its factorization.

213241305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22760.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 213241305 is about 14602.7841523457. The cubic root of 213241305 is about 597.4347004728.

Adding to 213241305 its reverse (503142312), we get a palindrome (716383617).

The spelling of 213241305 in words is "two hundred thirteen million, two hundred forty-one thousand, three hundred five".