201510001 has 12 divisors (see below), whose sum is σ = 255720240. Its totient is φ = 157020360.

The previous prime is 201509983. The next prime is 201510007. The reversal of 201510001 is 100015102.

It is a happy number.

It is not a de Polignac number, because 201510001 - 2⁷ = 201509873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201510001.

It is not an unprimeable number, because it can be changed into a prime (201510007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186391 + ... + 187468.

It is an arithmetic number, because the mean of its divisors is an integer number (21310020).

Almost surely, 2^201510001 is an apocalyptic number.

It is an amenable number.

201510001 is a deficient number, since it is larger than the sum of its proper divisors (54210239).

201510001 is a wasteful number, since it uses less digits than its factorization.

201510001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373884 (or 373877 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 201510001 is about 14195.4218324078. The cubic root of 201510001 is about 586.2716157471.

Adding to 201510001 its reverse (100015102), we get a palindrome (301525103).

The spelling of 201510001 in words is "two hundred one million, five hundred ten thousand, one".