303142313 has 4 divisors (see below), whose sum is σ = 303862788. Its totient is φ = 302421840.

The previous prime is 303142297. The next prime is 303142327. The reversal of 303142313 is 313241303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313241303 = 17 ⋅18425959.

It can be written as a sum of positive squares in 2 ways, for example, as 58782889 + 244359424 = 7667^2 + 15632^2 .

It is a cyclic number.

It is not a de Polignac number, because 303142313 - 2⁴ = 303142297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (303142373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359606 + ... + 360447.

It is an arithmetic number, because the mean of its divisors is an integer number (75965697).

Almost surely, 2^303142313 is an apocalyptic number.

It is an amenable number.

303142313 is a deficient number, since it is larger than the sum of its proper divisors (720475).

303142313 is an equidigital number, since it uses as much as digits as its factorization.

303142313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720474.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 303142313 is about 17410.9825397650. The cubic root of 303142313 is about 671.7621342858.

Adding to 303142313 its reverse (313241303), we get a palindrome (616383616).

The spelling of 303142313 in words is "three hundred three million, one hundred forty-two thousand, three hundred thirteen".