201438216 has 72 divisors (see below), whose sum is σ = 634644270. Its totient is φ = 57552768.

The previous prime is 201438199. The next prime is 201438221. The reversal of 201438216 is 612834102.

201438216 is a `hidden beast` number, since 201 + 438 + 21 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 200335716 + 1102500 = 14154^2 + 1050^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 201438216.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 25021 + ... + 32076.

Almost surely, 2^201438216 is an apocalyptic number.

It is an amenable number.

201438216 is an abundant number, since it is smaller than the sum of its proper divisors (433206054).

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

201438216 is a wasteful number, since it uses less digits than its factorization.

201438216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57123 (or 57109 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 201438216 is about 14192.8931511514. The cubic root of 201438216 is about 586.2019905736.

The spelling of 201438216 in words is "two hundred one million, four hundred thirty-eight thousand, two hundred sixteen".