203240313 has 8 divisors (see below), whose sum is σ = 301096800. Its totient is φ = 135493524.

The previous prime is 203240293. The next prime is 203240339. The reversal of 203240313 is 313042302.

It is not a de Polignac number, because 203240313 - 2⁵ = 203240281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203240363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3763683 + ... + 3763736.

It is an arithmetic number, because the mean of its divisors is an integer number (37637100).

Almost surely, 2^203240313 is an apocalyptic number.

It is an amenable number.

203240313 is a deficient number, since it is larger than the sum of its proper divisors (97856487).

203240313 is an equidigital number, since it uses as much as digits as its factorization.

203240313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7527428 (or 7527422 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 203240313 is about 14256.2376874125. The cubic root of 203240313 is about 587.9448875876.

Adding to 203240313 its reverse (313042302), we get a palindrome (516282615).

The spelling of 203240313 in words is "two hundred three million, two hundred forty thousand, three hundred thirteen".