204031313 has 4 divisors (see below), whose sum is σ = 204232560. Its totient is φ = 203830068.

The previous prime is 204031309. The next prime is 204031319. The reversal of 204031313 is 313130402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204031313 - 2² = 204031309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204031291 and 204031300.

It is not an unprimeable number, because it can be changed into a prime (204031319) 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 3 ways as a sum of consecutive naturals, for example, 99095 + ... + 101132.

It is an arithmetic number, because the mean of its divisors is an integer number (51058140).

Almost surely, 2^204031313 is an apocalyptic number.

It is an amenable number.

204031313 is a deficient number, since it is larger than the sum of its proper divisors (201247).

204031313 is a wasteful number, since it uses less digits than its factorization.

204031313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201246.

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

The square root of 204031313 is about 14283.9529892814. The cubic root of 204031313 is about 588.7066498014.

Adding to 204031313 its reverse (313130402), we get a palindrome (517161715).

The spelling of 204031313 in words is "two hundred four million, thirty-one thousand, three hundred thirteen".