163315620 has 144 divisors (see below), whose sum is σ = 541562112. Its totient is φ = 39594240.

The previous prime is 163315613. The next prime is 163315703. The reversal of 163315620 is 26513361.

163315620 is a `hidden beast` number, since 1 + 6 + 3 + 31 + 5 + 620 = 666.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 165649 + ... + 166631.

It is an arithmetic number, because the mean of its divisors is an integer number (3760848).

Almost surely, 2^163315620 is an apocalyptic number.

163315620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 12779×12780.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163315620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270781056).

163315620 is an abundant number, since it is smaller than the sum of its proper divisors (378246492).

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

163315620 is a wasteful number, since it uses less digits than its factorization.

163315620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 163315620 is about 12779.4999902187. The cubic root of 163315620 is about 546.6079048148.

Adding to 163315620 its reverse (26513361), we get a palindrome (189828981).

The spelling of 163315620 in words is "one hundred sixty-three million, three hundred fifteen thousand, six hundred twenty".