201228215184 has 60 divisors (see below), whose sum is σ = 563198872236. Its totient is φ = 67071384576.

The previous prime is 201228215183. The next prime is 201228215191. The reversal of 201228215184 is 481512822102.

It is a happy number.

201228215184 is a `hidden beast` number, since 201 + 228 + 2 + 151 + 84 = 666.

201228215184 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 195869975184 + 5358240000 = 442572^2 + 73200^2 .

It is a super-2 number, since 2×201228215184² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (201228215183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2467932 + ... + 2548164.

Almost surely, 2^201228215184 is an apocalyptic number.

201228215184 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

201228215184 is an abundant number, since it is smaller than the sum of its proper divisors (361970657052).

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

201228215184 is a wasteful number, since it uses less digits than its factorization.

201228215184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97664 (or 97655 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The spelling of 201228215184 in words is "two hundred one billion, two hundred twenty-eight million, two hundred fifteen thousand, one hundred eighty-four".