421731163 has 8 divisors (see below), whose sum is σ = 507345920. Its totient is φ = 342458280.

The previous prime is 421731157. The next prime is 421731173. The reversal of 421731163 is 361137124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-421731163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421731173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1585323 + ... + 1585588.

It is an arithmetic number, because the mean of its divisors is an integer number (63418240).

Almost surely, 2^421731163 is an apocalyptic number.

421731163 is a deficient number, since it is larger than the sum of its proper divisors (85614757).

421731163 is a wasteful number, since it uses less digits than its factorization.

421731163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170937.

The product of its digits is 3024, while the sum is 28.

The square root of 421731163 is about 20536.0941515177. The cubic root of 421731163 is about 749.9147535704.

Adding to 421731163 its reverse (361137124), we get a palindrome (782868287).

The spelling of 421731163 in words is "four hundred twenty-one million, seven hundred thirty-one thousand, one hundred sixty-three".