200135521 has 4 divisors (see below), whose sum is σ = 200164032. Its totient is φ = 200107012.

The previous prime is 200135513. The next prime is 200135527. The reversal of 200135521 is 125531002.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 200135521 - 2³ = 200135513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200135527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4500 + ... + 20506.

It is an arithmetic number, because the mean of its divisors is an integer number (50041008).

Almost surely, 2^200135521 is an apocalyptic number.

It is an amenable number.

200135521 is a deficient number, since it is larger than the sum of its proper divisors (28511).

200135521 is a wasteful number, since it uses less digits than its factorization.

200135521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28510.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 200135521 is about 14146.9262032429. The cubic root of 200135521 is about 584.9356064218.

Adding to 200135521 its reverse (125531002), we get a palindrome (325666523).

The spelling of 200135521 in words is "two hundred million, one hundred thirty-five thousand, five hundred twenty-one".