200542661 has 4 divisors (see below), whose sum is σ = 218773824. Its totient is φ = 182311500.

The previous prime is 200542637. The next prime is 200542673. The reversal of 200542661 is 166245002.

200542661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 200542661 - 2¹⁸ = 200280517 is a prime.

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 200542661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200542621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9115565 + ... + 9115586.

It is an arithmetic number, because the mean of its divisors is an integer number (54693456).

Almost surely, 2^200542661 is an apocalyptic number.

It is an amenable number.

200542661 is a deficient number, since it is larger than the sum of its proper divisors (18231163).

200542661 is a wasteful number, since it uses less digits than its factorization.

200542661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18231162.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 200542661 is about 14161.3085906635. The cubic root of 200542661 is about 585.3319867881.

Adding to 200542661 its reverse (166245002), we get a palindrome (366787663).

The spelling of 200542661 in words is "two hundred million, five hundred forty-two thousand, six hundred sixty-one".