163218412 has 18 divisors (see below), whose sum is σ = 332266452. Its totient is φ = 69950664.

The previous prime is 163218397. The next prime is 163218413. The reversal of 163218412 is 214812361.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (163218413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 416178 + ... + 416569.

Almost surely, 2^163218412 is an apocalyptic number.

It is an amenable number.

163218412 is an abundant number, since it is smaller than the sum of its proper divisors (169048040).

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

163218412 is a wasteful number, since it uses less digits than its factorization.

163218412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832765 (or 832756 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 163218412 is about 12775.6961454161. The cubic root of 163218412 is about 546.4994334453.

The spelling of 163218412 in words is "one hundred sixty-three million, two hundred eighteen thousand, four hundred twelve".