84215045 is nontrivially palindromic in base 2, base 4 and base 16.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a 13-Lehmer number, since φ(84215045) divides (84215045-1)13.
It is a cyclic number.
It is a Duffinian number.
84215045 is an undulating number in base 16.
It is a zygodrome in base 4.
It is a congruent number.
It is an unprimeable number.
In principle, a polygon with 84215045 sides can be constructed with ruler and compass.
Almost surely, 284215045 is an apocalyptic number.
It is an amenable number.
84215045 is a wasteful number, since it uses less digits than its factorization.
84215045 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 65799.
The square root of 84215045 is about 9176.8755576176. The cubic root of 84215045 is about 438.3253231760.
The spelling of 84215045 in words is "eighty-four million, two hundred fifteen thousand, forty-five".