621330216 has 32 divisors (see below), whose sum is σ = 1672812960. Its totient is φ = 191178432.

The previous prime is 621330187. The next prime is 621330217. The reversal of 621330216 is 612033126.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (621330217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995410 + ... + 996033.

It is an arithmetic number, because the mean of its divisors is an integer number (52275405).

Almost surely, 2^621330216 is an apocalyptic number.

It is an amenable number.

621330216 is an abundant number, since it is smaller than the sum of its proper divisors (1051482744).

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

621330216 is a wasteful number, since it uses less digits than its factorization.

621330216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991465 (or 1991461 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 621330216 is about 24926.4962640159. The cubic root of 621330216 is about 853.3112894425.

The spelling of 621330216 in words is "six hundred twenty-one million, three hundred thirty thousand, two hundred sixteen".