213213112 has 24 divisors (see below), whose sum is σ = 465044760. Its totient is φ = 91376880.

The previous prime is 213213089. The next prime is 213213127. The reversal of 213213112 is 211312312.

It is a super-2 number, since 2×213213112² = 90919662257449088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 271564 + ... + 272347.

It is an arithmetic number, because the mean of its divisors is an integer number (19376865).

Almost surely, 2^213213112 is an apocalyptic number.

It is an amenable number.

213213112 is an abundant number, since it is smaller than the sum of its proper divisors (251831648).

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

213213112 is a wasteful number, since it uses less digits than its factorization.

213213112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543931 (or 543920 counting only the distinct ones).

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

The square root of 213213112 is about 14601.8187908219. The cubic root of 213213112 is about 597.4083700223.

Adding to 213213112 its reverse (211312312), we get a palindrome (424525424).

The spelling of 213213112 in words is "two hundred thirteen million, two hundred thirteen thousand, one hundred twelve".