Multipling 91125000 by its sum of digits (18), we get a square (1640250000 = 405002).
91125000 divided by its sum of digits (18) gives a square (5062500 = 22502).
Adding to 91125000 its reverse (52119), we get a palindrome (91177119).
The cubic root of 91125000 is 450.
It is an ABA number since it can be written as A⋅BA, here for A=2, B=6750.
It is a nialpdrome in base 15.
It is an unprimeable number.
Almost surely, 291125000 is an apocalyptic number.
91125000 is a gapful number since it is divisible by the number (90) 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 91125000
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
91125000 is an frugal number, since it uses more digits than its factorization.
91125000 is an odious number, because the sum of its binary digits is odd.
The square root of 91125000 is about 9545.9415460184.
The spelling of 91125000 in words is "ninety-one million, one hundred twenty-five thousand".