213504211 has 2 divisors, whose sum is σ = 213504212. Its totient is φ = 213504210.

The previous prime is 213504199. The next prime is 213504229. The reversal of 213504211 is 112405312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213504211 is a prime.

It is a super-2 number, since 2×213504211² = 91168096229465042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213504251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106752105 + 106752106.

It is an arithmetic number, because the mean of its divisors is an integer number (106752106).

Almost surely, 2^213504211 is an apocalyptic number.

213504211 is a deficient number, since it is larger than the sum of its proper divisors (1).

213504211 is an equidigital number, since it uses as much as digits as its factorization.

213504211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 213504211 is about 14611.7832929455. The cubic root of 213504211 is about 597.6801261283.

Adding to 213504211 its reverse (112405312), we get a palindrome (325909523).

The spelling of 213504211 in words is "two hundred thirteen million, five hundred four thousand, two hundred eleven".