213311205 has 32 divisors (see below), whose sum is σ = 385451520. Its totient is φ = 111896640.

The previous prime is 213311201. The next prime is 213311209. The reversal of 213311205 is 502113312.

It is an interprime number because it is at equal distance from previous prime (213311201) and next prime (213311209).

It is not a de Polignac number, because 213311205 - 2² = 213311201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213311201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4717 + ... + 21186.

It is an arithmetic number, because the mean of its divisors is an integer number (12045360).

Almost surely, 2^213311205 is an apocalyptic number.

It is an amenable number.

213311205 is a deficient number, since it is larger than the sum of its proper divisors (172140315).

213311205 is a wasteful number, since it uses less digits than its factorization.

213311205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25978 (or 25972 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 213311205 is about 14605.1773354520. The cubic root of 213311205 is about 597.4999725728.

Adding to 213311205 its reverse (502113312), we get a palindrome (715424517).

The spelling of 213311205 in words is "two hundred thirteen million, three hundred eleven thousand, two hundred five".