201142566 has 12 divisors (see below), whose sum is σ = 435808932. Its totient is φ = 67047516.

The previous prime is 201142561. The next prime is 201142631. The reversal of 201142566 is 665241102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201142561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5587276 + ... + 5587311.

It is an arithmetic number, because the mean of its divisors is an integer number (36317411).

Almost surely, 2^201142566 is an apocalyptic number.

201142566 is an abundant number, since it is smaller than the sum of its proper divisors (234666366).

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

201142566 is a wasteful number, since it uses less digits than its factorization.

201142566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11174595 (or 11174592 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 201142566 is about 14182.4739026730. The cubic root of 201142566 is about 585.9150614426.

Adding to 201142566 its reverse (665241102), we get a palindrome (866383668).

The spelling of 201142566 in words is "two hundred one million, one hundred forty-two thousand, five hundred sixty-six".