1311000031 has 6 divisors (see below), whose sum is σ = 1441016696. Its totient is φ = 1191818100.

The previous prime is 1310999971. The next prime is 1311000043. The reversal of 1311000031 is 1300001131.

It is not a de Polignac number, because 1311000031 - 2⁷ = 1310999903 is a prime.

It is a super-2 number, since 2×1311000031² = 3437442162564001922, 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 = 1310999981 and 1311000017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311000331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5417235 + ... + 5417476.

Almost surely, 2^1311000031 is an apocalyptic number.

1311000031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1311000031 is a deficient number, since it is larger than the sum of its proper divisors (130016665).

1311000031 is a wasteful number, since it uses less digits than its factorization.

1311000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10834733 (or 10834722 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 1311000031 is about 36207.7344085487. The cubic root of 1311000031 is about 1094.4625375425.

Adding to 1311000031 its reverse (1300001131), we get a palindrome (2611001162).

The spelling of 1311000031 in words is "one billion, three hundred eleven million, thirty-one", and thus it is an aban number.