163943325 has 192 divisors, whose sum is σ = 394974720. Its totient is φ = 64696320.

The previous prime is 163943317. The next prime is 163943341. The reversal of 163943325 is 523349361.

It is a happy number.

It is not a de Polignac number, because 163943325 - 2³ = 163943317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163943325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1044147 + ... + 1044303.

It is an arithmetic number, because the mean of its divisors is an integer number (2057160).

Almost surely, 2^163943325 is an apocalyptic number.

163943325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163943325 is an abundant number, since it is smaller than the sum of its proper divisors (231031395).

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

163943325 is a wasteful number, since it uses less digits than its factorization.

163943325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 202 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 163943325 is about 12804.0354966706. The cubic root of 163943325 is about 547.3073069315.

The spelling of 163943325 in words is "one hundred sixty-three million, nine hundred forty-three thousand, three hundred twenty-five".