163105280 has 160 divisors (see below), whose sum is σ = 438253200. Its totient is φ = 58146816.

The previous prime is 163105279. The next prime is 163105289. The reversal of 163105280 is 82501361.

163105280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 10137856 + 152967424 = 3184^2 + 12368^2 .

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (163105289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5624306 + ... + 5624334.

Almost surely, 2^163105280 is an apocalyptic number.

163105280 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 163105280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219126600).

163105280 is an abundant number, since it is smaller than the sum of its proper divisors (275147920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163105280 is an frugal number, since it uses more digits than its factorization.

163105280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 163105280 is about 12771.2677522633. The cubic root of 163105280 is about 546.3731387393.

The spelling of 163105280 in words is "one hundred sixty-three million, one hundred five thousand, two hundred eighty".