163212720 has 160 divisors (see below), whose sum is σ = 556464384. Its totient is φ = 39244800.

The previous prime is 163212719. The next prime is 163212787. The reversal of 163212720 is 27212361.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 556894 + ... + 557186.

Almost surely, 2^163212720 is an apocalyptic number.

163212720 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 163212720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278232192).

163212720 is an abundant number, since it is smaller than the sum of its proper divisors (393251664).

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

163212720 is a wasteful number, since it uses less digits than its factorization.

163212720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 163212720 is about 12775.4733767481. The cubic root of 163212720 is about 546.4930805857.

The spelling of 163212720 in words is "one hundred sixty-three million, two hundred twelve thousand, seven hundred twenty".