631721472 has 80 divisors (see below), whose sum is σ = 1737364992. Its totient is φ = 203765760.

The previous prime is 631721449. The next prime is 631721477. The reversal of 631721472 is 274127136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631721477) 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, 40983 + ... + 54249.

Almost surely, 2^631721472 is an apocalyptic number.

631721472 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631721472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868682496).

631721472 is an abundant number, since it is smaller than the sum of its proper divisors (1105643520).

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

631721472 is a wasteful number, since it uses less digits than its factorization.

631721472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13319 (or 13303 counting only the distinct ones).

The product of its digits is 14112, while the sum is 33.

The square root of 631721472 is about 25134.0699449970. The cubic root of 631721472 is about 858.0419994546.

The spelling of 631721472 in words is "six hundred thirty-one million, seven hundred twenty-one thousand, four hundred seventy-two".