163981224 has 96 divisors (see below), whose sum is σ = 487412640. Its totient is φ = 49392000.

The previous prime is 163981217. The next prime is 163981241. The reversal of 163981224 is 422189361.

163981224 is a `hidden beast` number, since 1 + 639 + 8 + 12 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155499 + ... + 156549.

It is an arithmetic number, because the mean of its divisors is an integer number (5077215).

Almost surely, 2^163981224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163981224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243706320).

163981224 is an abundant number, since it is smaller than the sum of its proper divisors (323431416).

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

163981224 is a wasteful number, since it uses less digits than its factorization.

163981224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271 (or 1264 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 163981224 is about 12805.5153742440. The cubic root of 163981224 is about 547.3494776053.

The spelling of 163981224 in words is "one hundred sixty-three million, nine hundred eighty-one thousand, two hundred twenty-four".