201143001 has 4 divisors (see below), whose sum is σ = 268190672. Its totient is φ = 134095332.

The previous prime is 201142999. The next prime is 201143011. The reversal of 201143001 is 100341102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 201143001 - 2¹ = 201142999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201143011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33523831 + ... + 33523836.

It is an arithmetic number, because the mean of its divisors is an integer number (67047668).

Almost surely, 2^201143001 is an apocalyptic number.

It is an amenable number.

201143001 is a deficient number, since it is larger than the sum of its proper divisors (67047671).

201143001 is an equidigital number, since it uses as much as digits as its factorization.

201143001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67047670.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 201143001 is about 14182.4892384941. The cubic root of 201143001 is about 585.9154838177.

Adding to 201143001 its reverse (100341102), we get a palindrome (301484103).

The spelling of 201143001 in words is "two hundred one million, one hundred forty-three thousand, one".