200534403781 has 4 divisors (see below), whose sum is σ = 200721995500. Its totient is φ = 200346812064.

The previous prime is 200534403703. The next prime is 200534403791. The reversal of 200534403781 is 187304435002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82639000900 + 117895402881 = 287470^2 + 343359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200534403781 is a prime.

It is a super-2 number, since 2×200534403781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200534403781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200534403791) 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, 93794256 + ... + 93796393.

It is an arithmetic number, because the mean of its divisors is an integer number (50180498875).

Almost surely, 2^200534403781 is an apocalyptic number.

It is an amenable number.

200534403781 is a deficient number, since it is larger than the sum of its proper divisors (187591719).

200534403781 is a wasteful number, since it uses less digits than its factorization.

200534403781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187591718.

The product of its (nonzero) digits is 80640, while the sum is 37.

Adding to 200534403781 its reverse (187304435002), we get a palindrome (387838838783).

The spelling of 200534403781 in words is "two hundred billion, five hundred thirty-four million, four hundred three thousand, seven hundred eighty-one".