6631212 has 48 divisors (see below), whose sum is σ = 17902080. Its totient is φ = 1871232.

The previous prime is 6631193. The next prime is 6631213. The reversal of 6631212 is 2121366.

It is a happy number.

6631212 is digitally balanced in base 4, 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 (21).

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 (6631213) 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, 7033 + ... + 7919.

It is an arithmetic number, because the mean of its divisors is an integer number (372960).

Almost surely, 2^6631212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6631212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8951040).

6631212 is an abundant number, since it is smaller than the sum of its proper divisors (11270868).

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

6631212 is a wasteful number, since it uses less digits than its factorization.

6631212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 988 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 6631212 is about 2575.1139780600. The cubic root of 6631212 is about 187.8729713784.

Adding to 6631212 its reverse (2121366), we get a palindrome (8752578).

The spelling of 6631212 in words is "six million, six hundred thirty-one thousand, two hundred twelve".