203143013 has 12 divisors (see below), whose sum is σ = 218774340. Its totient is φ = 188554752.

The previous prime is 203143007. The next prime is 203143019. The reversal of 203143013 is 310341302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (203143007) and next prime (203143019).

It can be written as a sum of positive squares in 6 ways, for example, as 78552769 + 124590244 = 8863^2 + 11162^2 .

It is not a de Polignac number, because 203143013 - 2⁸ = 203142757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203142982 and 203143000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203143019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16283 + ... + 25911.

It is an arithmetic number, because the mean of its divisors is an integer number (18231195).

Almost surely, 2^203143013 is an apocalyptic number.

It is an amenable number.

203143013 is a deficient number, since it is larger than the sum of its proper divisors (15631327).

203143013 is an equidigital number, since it uses as much as digits as its factorization.

203143013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9736 (or 9719 counting only the distinct ones).

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

The square root of 203143013 is about 14252.8247375740. The cubic root of 203143013 is about 587.8510476593.

Adding to 203143013 its reverse (310341302), we get a palindrome (513484315).

The spelling of 203143013 in words is "two hundred three million, one hundred forty-three thousand, thirteen".