201217650 has 48 divisors (see below), whose sum is σ = 507223488. Its totient is φ = 52776000.

The previous prime is 201217633. The next prime is 201217693. The reversal of 201217650 is 56712102.

201217650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 201217650.

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, 1846 + ... + 20145.

It is an arithmetic number, because the mean of its divisors is an integer number (10567156).

Almost surely, 2^201217650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201217650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253611744).

201217650 is an abundant number, since it is smaller than the sum of its proper divisors (306005838).

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

201217650 is a wasteful number, since it uses less digits than its factorization.

201217650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22067 (or 22062 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 201217650 is about 14185.1207256054. The cubic root of 201217650 is about 585.9879572904.

Adding to 201217650 its reverse (56712102), we get a palindrome (257929752).

The spelling of 201217650 in words is "two hundred one million, two hundred seventeen thousand, six hundred fifty".