213015211 has 4 divisors (see below), whose sum is σ = 213953832. Its totient is φ = 212076592.

The previous prime is 213015199. The next prime is 213015217. The reversal of 213015211 is 112510312.

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 213015211 - 2⁹ = 213014699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213015217) 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, 468970 + ... + 469423.

It is an arithmetic number, because the mean of its divisors is an integer number (53488458).

Almost surely, 2^213015211 is an apocalyptic number.

213015211 is a deficient number, since it is larger than the sum of its proper divisors (938621).

213015211 is an equidigital number, since it uses as much as digits as its factorization.

213015211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938620.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 213015211 is about 14595.0406302963. The cubic root of 213015211 is about 597.2234778416.

Adding to 213015211 its reverse (112510312), we get a palindrome (325525523).

The spelling of 213015211 in words is "two hundred thirteen million, fifteen thousand, two hundred eleven".