203140317 has 8 divisors (see below), whose sum is σ = 270957024. Its totient is φ = 135375248.

The previous prime is 203140313. The next prime is 203140319. The reversal of 203140317 is 713041302.

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

It is a cyclic number.

It is not a de Polignac number, because 203140317 - 2² = 203140313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203140293 and 203140302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203140313) 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, 2538 + ... + 20315.

It is an arithmetic number, because the mean of its divisors is an integer number (33869628).

Almost surely, 2^203140317 is an apocalyptic number.

It is an amenable number.

203140317 is a deficient number, since it is larger than the sum of its proper divisors (67816707).

203140317 is a wasteful number, since it uses less digits than its factorization.

203140317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25819.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 203140317 is about 14252.7301595168. The cubic root of 203140317 is about 587.8484471048.

Adding to 203140317 its reverse (713041302), we get a palindrome (916181619).

The spelling of 203140317 in words is "two hundred three million, one hundred forty thousand, three hundred seventeen".