163663213 has 4 divisors (see below), whose sum is σ = 187043680. Its totient is φ = 140282748.

The previous prime is 163663121. The next prime is 163663217. The reversal of 163663213 is 312366361.

163663213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312366361 = 181 ⋅1725781.

It is a cyclic number.

It is not a de Polignac number, because 163663213 - 2¹⁷ = 163532141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163663217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11690223 + ... + 11690236.

It is an arithmetic number, because the mean of its divisors is an integer number (46760920).

Almost surely, 2^163663213 is an apocalyptic number.

It is an amenable number.

163663213 is a deficient number, since it is larger than the sum of its proper divisors (23380467).

163663213 is an equidigital number, since it uses as much as digits as its factorization.

163663213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23380466.

The product of its digits is 11664, while the sum is 31.

The square root of 163663213 is about 12793.0923939445. The cubic root of 163663213 is about 546.9954212224.

The spelling of 163663213 in words is "one hundred sixty-three million, six hundred sixty-three thousand, two hundred thirteen".