1131386311 has 4 divisors (see below), whose sum is σ = 1234239624. Its totient is φ = 1028533000.

The previous prime is 1131386297. The next prime is 1131386317. The reversal of 1131386311 is 1136831311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1131386311 - 2¹⁵ = 1131353543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131386311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131386317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51426640 + ... + 51426661.

It is an arithmetic number, because the mean of its divisors is an integer number (308559906).

Almost surely, 2^1131386311 is an apocalyptic number.

1131386311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131386311 is a deficient number, since it is larger than the sum of its proper divisors (102853313).

1131386311 is a wasteful number, since it uses less digits than its factorization.

1131386311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102853312.

The product of its digits is 1296, while the sum is 28.

The square root of 1131386311 is about 33636.0864400126. The cubic root of 1131386311 is about 1042.0062084945.

The spelling of 1131386311 in words is "one billion, one hundred thirty-one million, three hundred eighty-six thousand, three hundred eleven".