631212 has 24 divisors (see below), whose sum is σ = 1537536. Its totient is φ = 201168.

The previous prime is 631187. The next prime is 631223. The reversal of 631212 is 212136.

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

It is a junction number, because it is equal to n+sod(n) for n = 631191 and 631200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 868 + ... + 1419.

It is an arithmetic number, because the mean of its divisors is an integer number (64064).

2⁶³¹²¹² is an apocalyptic number.

It is an amenable number.

631212 is an abundant number, since it is smaller than the sum of its proper divisors (906324).

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

631212 is a wasteful number, since it uses less digits than its factorization.

631212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317 (or 2315 counting only the distinct ones).

The product of its digits is 72, while the sum is 15.

The square root of 631212 is about 794.4885147062. The cubic root of 631212 is about 85.7811272273.

Adding to 631212 its reverse (212136), we get a palindrome (843348).

It can be divided in two parts, 63 and 1212, that added together give a triangular number (1275 = T₅₀).

The spelling of 631212 in words is "six hundred thirty-one thousand, two hundred twelve".