216945750 has 192 divisors, whose sum is σ = 654331392. Its totient is φ = 46872000.

The previous prime is 216945733. The next prime is 216945767. The reversal of 216945750 is 57549612.

It is an interprime number because it is at equal distance from previous prime (216945733) and next prime (216945767).

It is a junction number, because it is equal to n+sod(n) for n = 216945699 and 216945708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5045229 + ... + 5045271.

It is an arithmetic number, because the mean of its divisors is an integer number (3407976).

Almost surely, 2^216945750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216945750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327165696).

216945750 is an abundant number, since it is smaller than the sum of its proper divisors (437385642).

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

216945750 is a wasteful number, since it uses less digits than its factorization.

216945750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 216945750 is about 14729.0783825737. The cubic root of 216945750 is about 600.8744194763.

The spelling of 216945750 in words is "two hundred sixteen million, nine hundred forty-five thousand, seven hundred fifty".