221640358300 has 72 divisors (see below), whose sum is σ = 485665915392. Its totient is φ = 87790080000.

The previous prime is 221640358271. The next prime is 221640358307. The reversal of 221640358300 is 3853046122.

221640358300 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221640358307) 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, 12997780 + ... + 13014820.

It is an arithmetic number, because the mean of its divisors is an integer number (6745359936).

Almost surely, 2^221640358300 is an apocalyptic number.

221640358300 is a gapful number since it is divisible by the number (20) 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 221640358300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242832957696).

221640358300 is an abundant number, since it is smaller than the sum of its proper divisors (264025557092).

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

221640358300 is a wasteful number, since it uses less digits than its factorization.

221640358300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18319 (or 18312 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 221640358300 in words is "two hundred twenty-one billion, six hundred forty million, three hundred fifty-eight thousand, three hundred".