163621242 has 64 divisors (see below), whose sum is σ = 375217920. Its totient is φ = 52819200.

The previous prime is 163621189. The next prime is 163621259. The reversal of 163621242 is 242126361.

163621242 is a `hidden beast` number, since 1 + 636 + 2 + 1 + 24 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 582142 + ... + 582422.

It is an arithmetic number, because the mean of its divisors is an integer number (5862780).

Almost surely, 2^163621242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163621242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187608960).

163621242 is an abundant number, since it is smaller than the sum of its proper divisors (211596678).

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

163621242 is a wasteful number, since it uses less digits than its factorization.

163621242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 590 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 163621242 is about 12791.4519113352. The cubic root of 163621242 is about 546.9486587130.

The spelling of 163621242 in words is "one hundred sixty-three million, six hundred twenty-one thousand, two hundred forty-two".