251664 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.
2251664 is an apocalyptic number.
251664 is a gapful number since it is divisible by the number (24) 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 251664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381672).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
251664 is a wasteful number, since it uses less digits than its factorization.
251664 is an odious number, because the sum of its binary digits is odd.
The square root of 251664 is about 501.6612402807. The cubic root of 251664 is about 63.1355107812.
The spelling of 251664 in words is "two hundred fifty-one thousand, six hundred sixty-four".