1311369231 has 16 divisors (see below), whose sum is σ = 1790820864. Its totient is φ = 853188864.

The previous prime is 1311369221. The next prime is 1311369263. The reversal of 1311369231 is 1329631131.

It is not a de Polignac number, because 1311369231 - 2¹⁹ = 1310844943 is a prime.

It is a super-2 number, since 2×1311369231² = 3439378520027062722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311369221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36600 + ... + 62946.

It is an arithmetic number, because the mean of its divisors is an integer number (111926304).

Almost surely, 2^1311369231 is an apocalyptic number.

1311369231 is a deficient number, since it is larger than the sum of its proper divisors (479451633).

1311369231 is a wasteful number, since it uses less digits than its factorization.

1311369231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26750.

The product of its digits is 2916, while the sum is 30.

The square root of 1311369231 is about 36212.8324078634. The cubic root of 1311369231 is about 1094.5652676808.

The spelling of 1311369231 in words is "one billion, three hundred eleven million, three hundred sixty-nine thousand, two hundred thirty-one".