201142161 has 24 divisors (see below), whose sum is σ = 318314880. Its totient is φ = 121380000.

The previous prime is 201142141. The next prime is 201142171. The reversal of 201142161 is 161241102.

It is not a de Polignac number, because 201142161 - 2⁵ = 201142129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201142141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19411 + ... + 27911.

It is an arithmetic number, because the mean of its divisors is an integer number (13263120).

Almost surely, 2^201142161 is an apocalyptic number.

It is an amenable number.

201142161 is a deficient number, since it is larger than the sum of its proper divisors (117172719).

201142161 is a wasteful number, since it uses less digits than its factorization.

201142161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8757 (or 8754 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 201142161 is about 14182.4596244798. The cubic root of 201142161 is about 585.9146681962.

Adding to 201142161 its reverse (161241102), we get a palindrome (362383263).

The spelling of 201142161 in words is "two hundred one million, one hundred forty-two thousand, one hundred sixty-one".