163520500 has 96 divisors (see below), whose sum is σ = 419747328. Its totient is φ = 54864000.

The previous prime is 163520471. The next prime is 163520509. The reversal of 163520500 is 5025361.

163520500 = 2210² + 2211² + ... + 2242².

It is a happy number.

163520500 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

163520500 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163520509) 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, 70357 + ... + 72643.

It is an arithmetic number, because the mean of its divisors is an integer number (4372368).

Almost surely, 2^163520500 is an apocalyptic number.

163520500 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 163520500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209873664).

163520500 is an abundant number, since it is smaller than the sum of its proper divisors (256226828).

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

163520500 is a wasteful number, since it uses less digits than its factorization.

163520500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 163520500 is about 12787.5134408532. The cubic root of 163520500 is about 546.8363831235.

Adding to 163520500 its reverse (5025361), we get a palindrome (168545861).

The spelling of 163520500 in words is "one hundred sixty-three million, five hundred twenty thousand, five hundred".