421503344 has 20 divisors (see below), whose sum is σ = 819140280. Its totient is φ = 210112320.

The previous prime is 421503337. The next prime is 421503349. The reversal of 421503344 is 443305124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421503349) 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, 34499 + ... + 45090.

It is an arithmetic number, because the mean of its divisors is an integer number (40957014).

Almost surely, 2^421503344 is an apocalyptic number.

It is an amenable number.

421503344 is a deficient number, since it is larger than the sum of its proper divisors (397636936).

421503344 is a wasteful number, since it uses less digits than its factorization.

421503344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79928 (or 79922 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 421503344 is about 20530.5466074335. The cubic root of 421503344 is about 749.7796947012.

Adding to 421503344 its reverse (443305124), we get a palindrome (864808468).

The spelling of 421503344 in words is "four hundred twenty-one million, five hundred three thousand, three hundred forty-four".