216508950 has 180 divisors, whose sum is σ = 700431732. Its totient is φ = 49442400.

The previous prime is 216508949. The next prime is 216508967. The reversal of 216508950 is 59805612.

It is a happy number.

It is a super-2 number, since 2×216508950² = 93752250860205000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 197905 + ... + 198995.

Almost surely, 2^216508950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216508950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350215866).

216508950 is an abundant number, since it is smaller than the sum of its proper divisors (483922782).

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

216508950 is a wasteful number, since it uses less digits than its factorization.

216508950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 216508950 is about 14714.2430997996. The cubic root of 216508950 is about 600.4708803561.

The spelling of 216508950 in words is "two hundred sixteen million, five hundred eight thousand, nine hundred fifty".