213215 has 4 divisors (see below), whose sum is σ = 255864. Its totient is φ = 170568.

The previous prime is 213209. The next prime is 213217. The reversal of 213215 is 512312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213215 - 2¹⁴ = 196831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21317 + ... + 21326.

It is an arithmetic number, because the mean of its divisors is an integer number (63966).

2²¹³²¹⁵ is an apocalyptic number.

213215 is a deficient number, since it is larger than the sum of its proper divisors (42649).

213215 is an equidigital number, since it uses as much as digits as its factorization.

213215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42648.

The product of its digits is 60, while the sum is 14.

The square root of 213215 is about 461.7520979920. The cubic root of 213215 is about 59.7410133366.

Adding to 213215 its reverse (512312), we get a palindrome (725527).

The spelling of 213215 in words is "two hundred thirteen thousand, two hundred fifteen".