1131255318 has 16 divisors (see below), whose sum is σ = 2263133376. Its totient is φ = 376981320.

The previous prime is 1131255289. The next prime is 1131255331. The reversal of 1131255318 is 8135521311.

It is a super-2 number, since 2×1131255318² = 2559477189006562248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396 + ... + 47567.

It is an arithmetic number, because the mean of its divisors is an integer number (141445836).

Almost surely, 2^1131255318 is an apocalyptic number.

1131255318 is an abundant number, since it is smaller than the sum of its proper divisors (1131878058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131255318 is a wasteful number, since it uses less digits than its factorization.

1131255318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51899.

The product of its digits is 3600, while the sum is 30.

The square root of 1131255318 is about 33634.1391743568. The cubic root of 1131255318 is about 1041.9659921139.

Adding to 1131255318 its reverse (8135521311), we get a palindrome (9266776629).

The spelling of 1131255318 in words is "one billion, one hundred thirty-one million, two hundred fifty-five thousand, three hundred eighteen".