1311616131 has 8 divisors (see below), whose sum is σ = 1998653184. Its totient is φ = 749494920.

The previous prime is 1311616129. The next prime is 1311616133. The reversal of 1311616131 is 1316161131.

It is an interprime number because it is at equal distance from previous prime (1311616129) and next prime (1311616133).

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

It is not a de Polignac number, because 1311616131 - 2¹ = 1311616129 is a prime.

It is a super-2 number, since 2×1311616131² = 3440673750198818322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311616133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31228935 + ... + 31228976.

It is an arithmetic number, because the mean of its divisors is an integer number (249831648).

Almost surely, 2^1311616131 is an apocalyptic number.

1311616131 is a deficient number, since it is larger than the sum of its proper divisors (687037053).

1311616131 is an equidigital number, since it uses as much as digits as its factorization.

1311616131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62457921.

The product of its digits is 324, while the sum is 24.

The square root of 1311616131 is about 36216.2412599651. The cubic root of 1311616131 is about 1094.6339570068.

Adding to 1311616131 its reverse (1316161131), we get a palindrome (2627777262).

The spelling of 1311616131 in words is "one billion, three hundred eleven million, six hundred sixteen thousand, one hundred thirty-one".