201516606 has 32 divisors (see below), whose sum is σ = 474158880. Its totient is φ = 63220608.

The previous prime is 201516587. The next prime is 201516617. The reversal of 201516606 is 606615102.

It is a happy number.

201516606 is a `hidden beast` number, since 2 + 0 + 1 + 51 + 6 + 606 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 201516606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108841 + ... + 110676.

It is an arithmetic number, because the mean of its divisors is an integer number (14817465).

Almost surely, 2^201516606 is an apocalyptic number.

201516606 is an abundant number, since it is smaller than the sum of its proper divisors (272642274).

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

201516606 is a wasteful number, since it uses less digits than its factorization.

201516606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219545 (or 219539 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 201516606 is about 14195.6544759303. The cubic root of 201516606 is about 586.2780211889.

The spelling of 201516606 in words is "two hundred one million, five hundred sixteen thousand, six hundred six".