201016506 has 8 divisors (see below), whose sum is σ = 402033024. Its totient is φ = 67005500.

The previous prime is 201016471. The next prime is 201016511. The reversal of 201016506 is 605610102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

201016506 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16751370 + ... + 16751381.

It is an arithmetic number, because the mean of its divisors is an integer number (50254128).

Almost surely, 2^201016506 is an apocalyptic number.

201016506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

201016506 is a wasteful number, since it uses less digits than its factorization.

201016506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33502756.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 201016506 is about 14178.0289885442. The cubic root of 201016506 is about 585.7926343677.

Adding to 201016506 its reverse (605610102), we get a palindrome (806626608).

The spelling of 201016506 in words is "two hundred one million, sixteen thousand, five hundred six".