213343212 has 12 divisors (see below), whose sum is σ = 497800856. Its totient is φ = 71114400.

The previous prime is 213343187. The next prime is 213343231. The reversal of 213343212 is 212343312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×213343212² = 91030652212953888, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8889289 + ... + 8889312.

Almost surely, 2^213343212 is an apocalyptic number.

It is an amenable number.

213343212 is an abundant number, since it is smaller than the sum of its proper divisors (284457644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213343212 is a wasteful number, since it uses less digits than its factorization.

213343212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17778608 (or 17778606 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 213343212 is about 14606.2730359254. The cubic root of 213343212 is about 597.5298557119.

Adding to 213343212 its reverse (212343312), we get a palindrome (425686524).

The spelling of 213343212 in words is "two hundred thirteen million, three hundred forty-three thousand, two hundred twelve".