213331212 has 48 divisors (see below), whose sum is σ = 570931200. Its totient is φ = 68815440.

The previous prime is 213331211. The next prime is 213331219. The reversal of 213331212 is 212133312.

213331212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is not an unprimeable number, because it can be changed into a prime (213331211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28512 + ... + 35207.

It is an arithmetic number, because the mean of its divisors is an integer number (11894400).

Almost surely, 2^213331212 is an apocalyptic number.

It is an amenable number.

213331212 is an abundant number, since it is smaller than the sum of its proper divisors (357599988).

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

213331212 is a wasteful number, since it uses less digits than its factorization.

213331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63763 (or 63755 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 213331212 is about 14605.8622477415. The cubic root of 213331212 is about 597.5186523358.

Adding to 213331212 its reverse (212133312), we get a palindrome (425464524).

The spelling of 213331212 in words is "two hundred thirteen million, three hundred thirty-one thousand, two hundred twelve".