163220236 has 48 divisors (see below), whose sum is σ = 311351040. Its totient is φ = 74634560.

The previous prime is 163220219. The next prime is 163220257. The reversal of 163220236 is 632022361.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 163220236.

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 15 ways as a sum of consecutive naturals, for example, 349275 + ... + 349741.

It is an arithmetic number, because the mean of its divisors is an integer number (6486480).

Almost surely, 2^163220236 is an apocalyptic number.

It is an amenable number.

163220236 is a deficient number, since it is larger than the sum of its proper divisors (148130804).

163220236 is a wasteful number, since it uses less digits than its factorization.

163220236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 163220236 is about 12775.7675307592. The cubic root of 163220236 is about 546.5014691863.

Adding to 163220236 its reverse (632022361), we get a palindrome (795242597).

The spelling of 163220236 in words is "one hundred sixty-three million, two hundred twenty thousand, two hundred thirty-six".