221303399520 has 384 divisors, whose sum is σ = 833687479296. Its totient is φ = 48286457856.

The previous prime is 221303399489. The next prime is 221303399591. The reversal of 221303399520 is 25993303122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6572167 + ... + 6605753.

It is an arithmetic number, because the mean of its divisors is an integer number (2171061144).

Almost surely, 2^221303399520 is an apocalyptic number.

221303399520 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 221303399520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416843739648).

221303399520 is an abundant number, since it is smaller than the sum of its proper divisors (612384079776).

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

221303399520 is a wasteful number, since it uses less digits than its factorization.

221303399520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33702 (or 33694 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 39.

The spelling of 221303399520 in words is "two hundred twenty-one billion, three hundred three million, three hundred ninety-nine thousand, five hundred twenty".