216203520 has 288 divisors, whose sum is σ = 766450944. Its totient is φ = 51609600.

The previous prime is 216203509. The next prime is 216203521. The reversal of 216203520 is 25302612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216203521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3045085 + ... + 3045155.

It is an arithmetic number, because the mean of its divisors is an integer number (2661288).

Almost surely, 2^216203520 is an apocalyptic number.

216203520 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 216203520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383225472).

216203520 is an abundant number, since it is smaller than the sum of its proper divisors (550247424).

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

216203520 is a wasteful number, since it uses less digits than its factorization.

216203520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 216203520 is about 14703.8607175123. The cubic root of 216203520 is about 600.1883852899.

The spelling of 216203520 in words is "two hundred sixteen million, two hundred three thousand, five hundred twenty".