631512252 has 144 divisors (see below), whose sum is σ = 1873627392. Its totient is φ = 175633920.

The previous prime is 631512251. The next prime is 631512281. The reversal of 631512252 is 252215136.

It is a happy number.

631512252 is a `hidden beast` number, since 631 + 5 + 1 + 2 + 25 + 2 = 666.

It is a super-2 number, since 2×631512252² = 797615448852223008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631512251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1907727 + ... + 1908057.

Almost surely, 2^631512252 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 631512252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (936813696).

631512252 is an abundant number, since it is smaller than the sum of its proper divisors (1242115140).

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

631512252 is a wasteful number, since it uses less digits than its factorization.

631512252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 523 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 631512252 is about 25129.9075207212. The cubic root of 631512252 is about 857.9472639437.

Adding to 631512252 its reverse (252215136), we get a palindrome (883727388).

The spelling of 631512252 in words is "six hundred thirty-one million, five hundred twelve thousand, two hundred fifty-two".