163206120 has 256 divisors, whose sum is σ = 646963200. Its totient is φ = 31887360.

The previous prime is 163206101. The next prime is 163206139. The reversal of 163206120 is 21602361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (163206101) and next prime (163206139).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156561 + ... + 157599.

It is an arithmetic number, because the mean of its divisors is an integer number (2527200).

Almost surely, 2^163206120 is an apocalyptic number.

163206120 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 163206120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323481600).

163206120 is an abundant number, since it is smaller than the sum of its proper divisors (483757080).

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

163206120 is a wasteful number, since it uses less digits than its factorization.

163206120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 1084 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 163206120 is about 12775.2150666828. The cubic root of 163206120 is about 546.4857141195.

Adding to 163206120 its reverse (21602361), we get a palindrome (184808481).

The spelling of 163206120 in words is "one hundred sixty-three million, two hundred six thousand, one hundred twenty".