201243006 has 48 divisors (see below), whose sum is σ = 462112560. Its totient is φ = 63181440.

The previous prime is 201242981. The next prime is 201243011. The reversal of 201243006 is 600342102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 201243006.

It is a congruent number.

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, 16701 + ... + 26103.

It is an arithmetic number, because the mean of its divisors is an integer number (9627345).

Almost surely, 2^201243006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201243006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231056280).

201243006 is an abundant number, since it is smaller than the sum of its proper divisors (260869554).

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

201243006 is a wasteful number, since it uses less digits than its factorization.

201243006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9481 (or 9478 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 201243006 is about 14186.0144508597. The cubic root of 201243006 is about 586.0125702515.

Adding to 201243006 its reverse (600342102), we get a palindrome (801585108).

The spelling of 201243006 in words is "two hundred one million, two hundred forty-three thousand, six".