163212520 has 64 divisors (see below), whose sum is σ = 388016640. Its totient is φ = 61689600.

The previous prime is 163212503. The next prime is 163212521. The reversal of 163212520 is 25212361.

It is a junction number, because it is equal to n+sod(n) for n = 163212491 and 163212500.

It is not an unprimeable number, because it can be changed into a prime (163212521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51790 + ... + 54850.

It is an arithmetic number, because the mean of its divisors is an integer number (6062760).

Almost surely, 2^163212520 is an apocalyptic number.

163212520 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 163212520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194008320).

163212520 is an abundant number, since it is smaller than the sum of its proper divisors (224804120).

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

163212520 is a wasteful number, since it uses less digits than its factorization.

163212520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3146 (or 3142 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 163212520 is about 12775.4655492471. The cubic root of 163212520 is about 546.4928573624.

Adding to 163212520 its reverse (25212361), we get a palindrome (188424881).

The spelling of 163212520 in words is "one hundred sixty-three million, two hundred twelve thousand, five hundred twenty".