163215243 has 20 divisors (see below), whose sum is σ = 245199240. Its totient is φ = 108192672.

The previous prime is 163215209. The next prime is 163215257. The reversal of 163215243 is 342512361.

163215243 is a `hidden beast` number, since 1 + 632 + 1 + 5 + 24 + 3 = 666.

It is not a de Polignac number, because 163215243 - 2¹⁴ = 163198859 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (163215743) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 8871 + ... + 20127.

It is an arithmetic number, because the mean of its divisors is an integer number (12259962).

Almost surely, 2^163215243 is an apocalyptic number.

163215243 is a deficient number, since it is larger than the sum of its proper divisors (81983997).

163215243 is a wasteful number, since it uses less digits than its factorization.

163215243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11448 (or 11439 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 163215243 is about 12775.5721202614. The cubic root of 163215243 is about 546.4958965324.

The spelling of 163215243 in words is "one hundred sixty-three million, two hundred fifteen thousand, two hundred forty-three".