163523444 has 48 divisors (see below), whose sum is σ = 336825216. Its totient is φ = 68016000.

The previous prime is 163523441. The next prime is 163523449. The reversal of 163523444 is 444325361.

It is a super-2 number, since 2×163523444² = 53479833475242272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 163523444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163523441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149339 + ... + 150429.

It is an arithmetic number, because the mean of its divisors is an integer number (7017192).

Almost surely, 2^163523444 is an apocalyptic number.

163523444 is a gapful number since it is divisible by the number (14) 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 163523444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168412608).

163523444 is an abundant number, since it is smaller than the sum of its proper divisors (173301772).

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

163523444 is a wasteful number, since it uses less digits than its factorization.

163523444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1254 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 163523444 is about 12787.6285526285. The cubic root of 163523444 is about 546.8396648255.

The spelling of 163523444 in words is "one hundred sixty-three million, five hundred twenty-three thousand, four hundred forty-four".