211132213 has 4 divisors (see below), whose sum is σ = 211213420. Its totient is φ = 211051008.

The previous prime is 211132211. The next prime is 211132217. The reversal of 211132213 is 312231112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 106131204 + 105001009 = 10302^2 + 10247^2 .

It is a cyclic number.

It is not a de Polignac number, because 211132213 - 2¹ = 211132211 is a prime.

It is a super-2 number, since 2×211132213² = 89153622732554738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211132211) 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, 36570 + ... + 41947.

It is an arithmetic number, because the mean of its divisors is an integer number (52803355).

Almost surely, 2^211132213 is an apocalyptic number.

It is an amenable number.

211132213 is a deficient number, since it is larger than the sum of its proper divisors (81207).

211132213 is an equidigital number, since it uses as much as digits as its factorization.

211132213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81206.

The product of its digits is 72, while the sum is 16.

The square root of 211132213 is about 14530.3892927891. The cubic root of 211132213 is about 595.4585011934.

Adding to 211132213 its reverse (312231112), we get a palindrome (523363325).

The spelling of 211132213 in words is "two hundred eleven million, one hundred thirty-two thousand, two hundred thirteen".