421056216 has 144 divisors (see below), whose sum is σ = 1384484400. Its totient is φ = 115049088.

The previous prime is 421056157. The next prime is 421056217. The reversal of 421056216 is 612650124.

It is a self number, because there is not a number n which added to its sum of digits gives 421056216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421056217) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 78550 + ... + 83738.

It is an arithmetic number, because the mean of its divisors is an integer number (9614475).

Almost surely, 2^421056216 is an apocalyptic number.

421056216 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421056216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692242200).

421056216 is an abundant number, since it is smaller than the sum of its proper divisors (963428184).

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

421056216 is a wasteful number, since it uses less digits than its factorization.

421056216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5238 (or 5224 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 421056216 is about 20519.6543830543. The cubic root of 421056216 is about 749.5144804288.

The spelling of 421056216 in words is "four hundred twenty-one million, fifty-six thousand, two hundred sixteen".