216362550 has 48 divisors (see below), whose sum is σ = 538246800. Its totient is φ = 57517440.

The previous prime is 216362543. The next prime is 216362579. The reversal of 216362550 is 55263612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50284 + ... + 54416.

It is an arithmetic number, because the mean of its divisors is an integer number (11213475).

Almost surely, 2^216362550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216362550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269123400).

216362550 is an abundant number, since it is smaller than the sum of its proper divisors (321884250).

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

216362550 is a wasteful number, since it uses less digits than its factorization.

216362550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497 (or 4492 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 216362550 is about 14709.2674868601. The cubic root of 216362550 is about 600.3355068015.

The spelling of 216362550 in words is "two hundred sixteen million, three hundred sixty-two thousand, five hundred fifty".