421331320 has 32 divisors (see below), whose sum is σ = 949554720. Its totient is φ = 168255360.

The previous prime is 421331311. The next prime is 421331333. The reversal of 421331320 is 23133124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16894 + ... + 33586.

It is an arithmetic number, because the mean of its divisors is an integer number (29673585).

Almost surely, 2^421331320 is an apocalyptic number.

421331320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421331320 is an abundant number, since it is smaller than the sum of its proper divisors (528223400).

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

421331320 is a wasteful number, since it uses less digits than its factorization.

421331320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17335 (or 17331 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 421331320 is about 20526.3567152089. The cubic root of 421331320 is about 749.6776807595.

Adding to 421331320 its reverse (23133124), we get a palindrome (444464444).

The spelling of 421331320 in words is "four hundred twenty-one million, three hundred thirty-one thousand, three hundred twenty".