1313031031 has 4 divisors (see below), whose sum is σ = 1414033432. Its totient is φ = 1212028632.

The previous prime is 1313031019. The next prime is 1313031037. The reversal of 1313031031 is 1301303131.

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 1313031031 - 2⁹ = 1313030519 is a prime.

It is a super-2 number, since 2×1313031031² = 3448100976737845922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313030996 and 1313031014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313031037) 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, 50501181 + ... + 50501206.

It is an arithmetic number, because the mean of its divisors is an integer number (353508358).

Almost surely, 2^1313031031 is an apocalyptic number.

1313031031 is a deficient number, since it is larger than the sum of its proper divisors (101002401).

1313031031 is a wasteful number, since it uses less digits than its factorization.

1313031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101002400.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 1313031031 is about 36235.7700483928. The cubic root of 1313031031 is about 1095.0274260417.

Adding to 1313031031 its reverse (1301303131), we get a palindrome (2614334162).

The spelling of 1313031031 in words is "one billion, three hundred thirteen million, thirty-one thousand, thirty-one".