212133312 has 42 divisors (see below), whose sum is σ = 608043488. Its totient is φ = 70710912.

The previous prime is 212133287. The next prime is 212133329. The reversal of 212133312 is 213331212.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183568 + ... + 184719.

Almost surely, 2^212133312 is an apocalyptic number.

It is an amenable number.

212133312 is an abundant number, since it is smaller than the sum of its proper divisors (395910176).

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

212133312 is a wasteful number, since it uses less digits than its factorization.

212133312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368305 (or 368292 counting only the distinct ones).

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

The square root of 212133312 is about 14564.7970119738. The cubic root of 212133312 is about 596.3981544475.

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

The spelling of 212133312 in words is "two hundred twelve million, one hundred thirty-three thousand, three hundred twelve".