213211215 has 24 divisors (see below), whose sum is σ = 422361888. Its totient is φ = 97467840.

The previous prime is 213211213. The next prime is 213211241. The reversal of 213211215 is 512112312.

It is not a de Polignac number, because 213211215 - 2¹ = 213211213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213211213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 338116 + ... + 338745.

It is an arithmetic number, because the mean of its divisors is an integer number (17598412).

Almost surely, 2^213211215 is an apocalyptic number.

213211215 is a deficient number, since it is larger than the sum of its proper divisors (209150673).

213211215 is a wasteful number, since it uses less digits than its factorization.

213211215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676879 (or 676876 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 213211215 is about 14601.7538330161. The cubic root of 213211215 is about 597.4065982629.

Adding to 213211215 its reverse (512112312), we get a palindrome (725323527).

The spelling of 213211215 in words is "two hundred thirteen million, two hundred eleven thousand, two hundred fifteen".