1231313303 has 24 divisors (see below), whose sum is σ = 1436400000. Its totient is φ = 1052419280.

The previous prime is 1231313287. The next prime is 1231313323. The reversal of 1231313303 is 3033131321.

It is not a de Polignac number, because 1231313303 - 2⁴ = 1231313287 is a prime.

It is a super-2 number, since 2×1231313303² = 3032264900289539618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231313323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160448 + ... + 167946.

It is an arithmetic number, because the mean of its divisors is an integer number (59850000).

Almost surely, 2^1231313303 is an apocalyptic number.

1231313303 is a deficient number, since it is larger than the sum of its proper divisors (205086697).

1231313303 is a wasteful number, since it uses less digits than its factorization.

1231313303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7603 (or 7592 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1231313303 is about 35090.0741378527. The cubic root of 1231313303 is about 1071.8224692902.

Adding to 1231313303 its reverse (3033131321), we get a palindrome (4264444624).

The spelling of 1231313303 in words is "one billion, two hundred thirty-one million, three hundred thirteen thousand, three hundred three".