1311541311 has 8 divisors (see below), whose sum is σ = 1761303040. Its totient is φ = 868070232.

The previous prime is 1311541261. The next prime is 1311541321. The reversal of 1311541311 is 1131451131.

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

It is not a de Polignac number, because 1311541311 - 2⁶ = 1311541247 is a prime.

It is a super-2 number, since 2×1311541311² = 3440281220919197442, 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 (1311541321) 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, 1572175 + ... + 1573008.

It is an arithmetic number, because the mean of its divisors is an integer number (220162880).

Almost surely, 2^1311541311 is an apocalyptic number.

1311541311 is a deficient number, since it is larger than the sum of its proper divisors (449761729).

1311541311 is a wasteful number, since it uses less digits than its factorization.

1311541311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145325.

The product of its digits is 180, while the sum is 21.

The square root of 1311541311 is about 36215.2082832613. The cubic root of 1311541311 is about 1094.6131424641.

Adding to 1311541311 its reverse (1131451131), we get a palindrome (2442992442).

The spelling of 1311541311 in words is "one billion, three hundred eleven million, five hundred forty-one thousand, three hundred eleven".