It is a Jordan-Polya number, since it can be written as 6! ⋅ (3!)3.
It is a tau number, because it is divible by the number of its divisors (96).
It is a nialpdrome in base 6 and base 12.
It is a congruent number.
155520 is a Friedman number, since it can be written as 20*(5+1^5)^5, using all its digits and the basic arithmetic operations.
2155520 is an apocalyptic number.
155520 is a gapful number since it is divisible by the number (10) 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 155520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278460).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
155520 is an frugal number, since it uses more digits than its factorization.
155520 is an evil number, because the sum of its binary digits is even.
The square root of 155520 is about 394.3602414037. The cubic root of 155520 is about 53.7768569587.
The spelling of 155520 in words is "one hundred fifty-five thousand, five hundred twenty".