1311013231 has 8 divisors (see below), whose sum is σ = 1442854224. Its totient is φ = 1181281920.

The previous prime is 1311013211. The next prime is 1311013261. The reversal of 1311013231 is 1323101131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311013231 - 2⁵ = 1311013199 is a prime.

It is a super-2 number, since 2×1311013231² = 3437511383714118722, 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 (1311013211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526116 + ... + 528601.

It is an arithmetic number, because the mean of its divisors is an integer number (180356778).

Almost surely, 2^1311013231 is an apocalyptic number.

1311013231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1311013231 is a deficient number, since it is larger than the sum of its proper divisors (131840993).

1311013231 is a wasteful number, since it uses less digits than its factorization.

1311013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054841.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1311013231 is about 36207.9166895860. The cubic root of 1311013231 is about 1094.4662107835.

Adding to 1311013231 its reverse (1323101131), we get a palindrome (2634114362).

The spelling of 1311013231 in words is "one billion, three hundred eleven million, thirteen thousand, two hundred thirty-one".