421503552 has 168 divisors, whose sum is σ = 1252118400. Its totient is φ = 135502848.

The previous prime is 421503529. The next prime is 421503553. The reversal of 421503552 is 255305124.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (421503553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2684658 + ... + 2684814.

Almost surely, 2^421503552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421503552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (626059200).

421503552 is an abundant number, since it is smaller than the sum of its proper divisors (830614848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421503552 is a wasteful number, since it uses less digits than its factorization.

421503552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 421503552 is about 20530.5516730555. The cubic root of 421503552 is about 749.7798180329.

Adding to 421503552 its reverse (255305124), we get a palindrome (676808676).

The spelling of 421503552 in words is "four hundred twenty-one million, five hundred three thousand, five hundred fifty-two".