203320061 has 6 divisors (see below), whose sum is σ = 236515230. Its totient is φ = 174274296.

The previous prime is 203320057. The next prime is 203320067. The reversal of 203320061 is 160023302.

It can be written as a sum of positive squares in only one way, i.e., 169156036 + 34164025 = 13006^2 + 5845^2 .

It is not a de Polignac number, because 203320061 - 2² = 203320057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203320067) 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 5 ways as a sum of consecutive naturals, for example, 2074646 + ... + 2074743.

It is an arithmetic number, because the mean of its divisors is an integer number (39419205).

Almost surely, 2^203320061 is an apocalyptic number.

It is an amenable number.

203320061 is a deficient number, since it is larger than the sum of its proper divisors (33195169).

203320061 is an equidigital number, since it uses as much as digits as its factorization.

203320061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149403 (or 4149396 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 203320061 is about 14259.0343642198. The cubic root of 203320061 is about 588.0217773491.

Adding to 203320061 its reverse (160023302), we get a palindrome (363343363).

The spelling of 203320061 in words is "two hundred three million, three hundred twenty thousand, sixty-one".