212231208 has 64 divisors (see below), whose sum is σ = 625950720. Its totient is φ = 58680000.

The previous prime is 212231207. The next prime is 212231219. The reversal of 212231208 is 802132212.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (212231207) by changing a digit.

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, 15168 + ... + 25583.

It is an arithmetic number, because the mean of its divisors is an integer number (9780480).

Almost surely, 2^212231208 is an apocalyptic number.

212231208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

212231208 is an abundant number, since it is smaller than the sum of its proper divisors (413719512).

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

212231208 is a wasteful number, since it uses less digits than its factorization.

212231208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40798 (or 40794 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 212231208 is about 14568.1573302872. The cubic root of 212231208 is about 596.4898829526.

The spelling of 212231208 in words is "two hundred twelve million, two hundred thirty-one thousand, two hundred eight".