631812 has 24 divisors (see below), whose sum is σ = 1515136. Its totient is φ = 204768.

The previous prime is 631789. The next prime is 631817. The reversal of 631812 is 218136.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 631812.

It is not an unprimeable number, because it can be changed into a prime (631817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268 + ... + 1155.

2⁶³¹⁸¹² is an apocalyptic number.

It is an amenable number.

631812 is an abundant number, since it is smaller than the sum of its proper divisors (883324).

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

631812 is a wasteful number, since it uses less digits than its factorization.

631812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467 (or 1465 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 631812 is about 794.8660264472. The cubic root of 631812 is about 85.8082984350.

Adding to 631812 its reverse (218136), we get a palindrome (849948).

The spelling of 631812 in words is "six hundred thirty-one thousand, eight hundred twelve".