163520125 has 32 divisors (see below), whose sum is σ = 214156800. Its totient is φ = 124488000.

The previous prime is 163520101. The next prime is 163520129. The reversal of 163520125 is 521025361.

It is not a de Polignac number, because 163520125 - 2⁷ = 163519997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 163520125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163520129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 286090 + ... + 286660.

It is an arithmetic number, because the mean of its divisors is an integer number (6692400).

Almost surely, 2^163520125 is an apocalyptic number.

It is an amenable number.

163520125 is a deficient number, since it is larger than the sum of its proper divisors (50636675).

163520125 is an equidigital number, since it uses as much as digits as its factorization.

163520125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 163520125 is about 12787.4987781036. The cubic root of 163520125 is about 546.8359651050.

Adding to 163520125 its reverse (521025361), we get a palindrome (684545486).

The spelling of 163520125 in words is "one hundred sixty-three million, five hundred twenty thousand, one hundred twenty-five".