421533163 has 4 divisors (see below), whose sum is σ = 422120160. Its totient is φ = 420946168.

The previous prime is 421533157. The next prime is 421533169. The reversal of 421533163 is 361335124.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (421533157) and next prime (421533169).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421533163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421533169) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 292420 + ... + 293857.

It is an arithmetic number, because the mean of its divisors is an integer number (105530040).

Almost surely, 2^421533163 is an apocalyptic number.

421533163 is a deficient number, since it is larger than the sum of its proper divisors (586997).

421533163 is an equidigital number, since it uses as much as digits as its factorization.

421533163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586996.

The product of its digits is 6480, while the sum is 28.

The square root of 421533163 is about 20531.2728051624. The cubic root of 421533163 is about 749.7973751884.

Adding to 421533163 its reverse (361335124), we get a palindrome (782868287).

The spelling of 421533163 in words is "four hundred twenty-one million, five hundred thirty-three thousand, one hundred sixty-three".