631522 has 8 divisors (see below), whose sum is σ = 997200. Its totient is φ = 299124.

The previous prime is 631513. The next prime is 631529. The reversal of 631522 is 225136.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 631522.

It is not an unprimeable number, because it can be changed into a prime (631529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8272 + ... + 8347.

It is an arithmetic number, because the mean of its divisors is an integer number (124650).

2⁶³¹⁵²² is an apocalyptic number.

631522 is a deficient number, since it is larger than the sum of its proper divisors (365678).

631522 is a wasteful number, since it uses less digits than its factorization.

631522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16640.

The product of its digits is 360, while the sum is 19.

The square root of 631522 is about 794.6835848311. The cubic root of 631522 is about 85.7951678335.

Adding to 631522 its reverse (225136), we get a palindrome (856658).

The spelling of 631522 in words is "six hundred thirty-one thousand, five hundred twenty-two".