212404332 has 48 divisors (see below), whose sum is σ = 568673280. Its totient is φ = 60444672.

The previous prime is 212404303. The next prime is 212404349. The reversal of 212404332 is 233404212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 212404299 and 212404308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16669 + ... + 26507.

It is an arithmetic number, because the mean of its divisors is an integer number (11847360).

Almost surely, 2^212404332 is an apocalyptic number.

It is an amenable number.

212404332 is an abundant number, since it is smaller than the sum of its proper divisors (356268948).

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

212404332 is a wasteful number, since it uses less digits than its factorization.

212404332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110 (or 10108 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 212404332 is about 14574.0979823796. The cubic root of 212404332 is about 596.6520310313.

Adding to 212404332 its reverse (233404212), we get a palindrome (445808544).

The spelling of 212404332 in words is "two hundred twelve million, four hundred four thousand, three hundred thirty-two".