200521142 has 4 divisors (see below), whose sum is σ = 300781716. Its totient is φ = 100260570.

The previous prime is 200521141. The next prime is 200521157. The reversal of 200521142 is 241125002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241125002 = 2 ⋅120562501.

It is a self number, because there is not a number n which added to its sum of digits gives 200521142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200521141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50130284 + ... + 50130287.

It is an arithmetic number, because the mean of its divisors is an integer number (75195429).

Almost surely, 2^200521142 is an apocalyptic number.

200521142 is a deficient number, since it is larger than the sum of its proper divisors (100260574).

200521142 is a wasteful number, since it uses less digits than its factorization.

200521142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100260573.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 200521142 is about 14160.5487888005. The cubic root of 200521142 is about 585.3110499136.

Adding to 200521142 its reverse (241125002), we get a palindrome (441646144).

The spelling of 200521142 in words is "two hundred million, five hundred twenty-one thousand, one hundred forty-two".