Adding to 656543232 its reverse (232345656), we get a palindrome (888888888).
656543232 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is an alternating number because its digits alternate between even and odd.
It is a congruent number.
It is an unprimeable number.
Almost surely, 2656543232 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 656543232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983962320).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
656543232 is an frugal number, since it uses more digits than its factorization.
656543232 is an odious number, because the sum of its binary digits is odd.
The square root of 656543232 is about 25623.0995783102. The cubic root of 656543232 is about 869.1360746143.
The spelling of 656543232 in words is "six hundred fifty-six million, five hundred forty-three thousand, two hundred thirty-two".