203240513 has 8 divisors (see below), whose sum is σ = 234104832. Its totient is φ = 172833696.

The previous prime is 203240509. The next prime is 203240551. The reversal of 203240513 is 315042302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 203240513 - 2² = 203240509 is a prime.

It is a super-2 number, since 2×203240513² = 82613412249006338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203290513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113420 + ... + 115197.

It is an arithmetic number, because the mean of its divisors is an integer number (29263104).

Almost surely, 2^203240513 is an apocalyptic number.

It is an amenable number.

203240513 is a deficient number, since it is larger than the sum of its proper divisors (30864319).

203240513 is a wasteful number, since it uses less digits than its factorization.

203240513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228751.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 203240513 is about 14256.2447018842. The cubic root of 203240513 is about 587.9450804446.

Adding to 203240513 its reverse (315042302), we get a palindrome (518282815).

The spelling of 203240513 in words is "two hundred three million, two hundred forty thousand, five hundred thirteen".