216750000 has 210 divisors, whose sum is σ = 743506108. Its totient is φ = 54400000.

The previous prime is 216749993. The next prime is 216750059. The reversal of 216750000 is 57612.

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 12749992 + ... + 12750008.

Almost surely, 2^216750000 is an apocalyptic number.

216750000 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 216750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371753054).

216750000 is an abundant number, since it is smaller than the sum of its proper divisors (526756108).

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

216750000 is an frugal number, since it uses more digits than its factorization.

216750000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 216750000 is about 14722.4318643355. The cubic root of 216750000 is about 600.6936422362.

The spelling of 216750000 in words is "two hundred sixteen million, seven hundred fifty thousand".