213111332 has 12 divisors (see below), whose sum is σ = 426222720. Its totient is φ = 91333416.

The previous prime is 213111323. The next prime is 213111359. The reversal of 213111332 is 233111312.

213111332 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

213111332 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 213111332.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3805532 + ... + 3805587.

It is an arithmetic number, because the mean of its divisors is an integer number (35518560).

Almost surely, 2^213111332 is an apocalyptic number.

It is an amenable number.

213111332 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

213111332 is a wasteful number, since it uses less digits than its factorization.

213111332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611130 (or 7611128 counting only the distinct ones).

The product of its digits is 108, while the sum is 17.

The square root of 213111332 is about 14598.3331925258. Note that the first 3 decimals coincide. The cubic root of 213111332 is about 597.3132947224.

Adding to 213111332 its reverse (233111312), we get a palindrome (446222644).

The spelling of 213111332 in words is "two hundred thirteen million, one hundred eleven thousand, three hundred thirty-two".