531633630 has 64 divisors (see below), whose sum is σ = 1396631808. Its totient is φ = 128444160.

The previous prime is 531633629. The next prime is 531633637. The reversal of 531633630 is 36336135.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531633637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100717 + ... + 105863.

It is an arithmetic number, because the mean of its divisors is an integer number (21822372).

Almost surely, 2^531633630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531633630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698315904).

531633630 is an abundant number, since it is smaller than the sum of its proper divisors (864998178).

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

531633630 is a wasteful number, since it uses less digits than its factorization.

531633630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481.

The product of its (nonzero) digits is 14580, while the sum is 30.

The square root of 531633630 is about 23057.1817445238. The cubic root of 531633630 is about 810.0978543569.

Adding to 531633630 its reverse (36336135), we get a palindrome (567969765).

The spelling of 531633630 in words is "five hundred thirty-one million, six hundred thirty-three thousand, six hundred thirty".