421155216 has 120 divisors (see below), whose sum is σ = 1262196000. Its totient is φ = 130692096.

The previous prime is 421155199. The next prime is 421155221. The reversal of 421155216 is 612551124.

It is a self number, because there is not a number n which added to its sum of digits gives 421155216.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160120 + ... + 162728.

It is an arithmetic number, because the mean of its divisors is an integer number (10518300).

Almost surely, 2^421155216 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 421155216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (631098000).

421155216 is an abundant number, since it is smaller than the sum of its proper divisors (841040784).

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

421155216 is a wasteful number, since it uses less digits than its factorization.

421155216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701 (or 2692 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 421155216 is about 20522.0665626052. The cubic root of 421155216 is about 749.5732185228.

The spelling of 421155216 in words is "four hundred twenty-one million, one hundred fifty-five thousand, two hundred sixteen".