1313143231 has 4 divisors (see below), whose sum is σ = 1314709200. Its totient is φ = 1311577264.

The previous prime is 1313143213. The next prime is 1313143241. The reversal of 1313143231 is 1323413131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1313143231 - 2⁷ = 1313143103 is a prime.

It is a super-2 number, since 2×1313143231² = 3448690290242238722, 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 (1313143201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781726 + ... + 783403.

It is an arithmetic number, because the mean of its divisors is an integer number (328677300).

Almost surely, 2^1313143231 is an apocalyptic number.

1313143231 is a deficient number, since it is larger than the sum of its proper divisors (1565969).

1313143231 is an equidigital number, since it uses as much as digits as its factorization.

1313143231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565968.

The product of its digits is 648, while the sum is 22.

The square root of 1313143231 is about 36237.3182092715. The cubic root of 1313143231 is about 1095.0586156011.

Adding to 1313143231 its reverse (1323413131), we get a palindrome (2636556362).

The spelling of 1313143231 in words is "one billion, three hundred thirteen million, one hundred forty-three thousand, two hundred thirty-one".