631444212 has 72 divisors (see below), whose sum is σ = 1828497216. Its totient is φ = 179985024.

The previous prime is 631444211. The next prime is 631444217. The reversal of 631444212 is 212444136.

It is a happy number.

631444212 is a `hidden beast` number, since 6 + 3 + 1 + 444 + 212 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631444211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112423 + ... + 117905.

Almost surely, 2^631444212 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 631444212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914248608).

631444212 is an abundant number, since it is smaller than the sum of its proper divisors (1197053004).

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

631444212 is a wasteful number, since it uses less digits than its factorization.

631444212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5957 (or 5952 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 631444212 is about 25128.5537188275. The cubic root of 631444212 is about 857.9164506970.

Adding to 631444212 its reverse (212444136), we get a palindrome (843888348).

The spelling of 631444212 in words is "six hundred thirty-one million, four hundred forty-four thousand, two hundred twelve".