631224 has 48 divisors (see below), whose sum is σ = 1867320. Its totient is φ = 191040.

The previous prime is 631223. The next prime is 631229. The reversal of 631224 is 422136.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 = 631197 and 631206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394 + ... + 1190.

2⁶³¹²²⁴ 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 631224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933660).

631224 is an abundant number, since it is smaller than the sum of its proper divisors (1236096).

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

631224 is a wasteful number, since it uses less digits than its factorization.

631224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 813 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 631224 is about 794.4960666989. The cubic root of 631224 is about 85.7816708202.

It can be divided in two parts, 6312 and 24, that added together give a palindrome (6336).

The spelling of 631224 in words is "six hundred thirty-one thousand, two hundred twenty-four".