163221231522 has 16 divisors (see below), whose sum is σ = 326447085312. Its totient is φ = 54406306800.

The previous prime is 163221231449. The next prime is 163221231533. The reversal of 163221231522 is 225132122361.

It is a self number, because there is not a number n which added to its sum of digits gives 163221231522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412888 + ... + 704924.

It is an arithmetic number, because the mean of its divisors is an integer number (20402942832).

Almost surely, 2^163221231522 is an apocalyptic number.

163221231522 is an abundant number, since it is smaller than the sum of its proper divisors (163225853790).

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

163221231522 is a wasteful number, since it uses less digits than its factorization.

163221231522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385193.

The product of its digits is 8640, while the sum is 30.

Adding to 163221231522 its reverse (225132122361), we get a palindrome (388353353883).

The spelling of 163221231522 in words is "one hundred sixty-three billion, two hundred twenty-one million, two hundred thirty-one thousand, five hundred twenty-two".