1131311018 has 8 divisors (see below), whose sum is σ = 1720867680. Its totient is φ = 557688460.

The previous prime is 1131311011. The next prime is 1131311029. The reversal of 1131311018 is 8101131311.

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

It is not an unprimeable number, because it can be changed into a prime (1131311011) 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, 3983348 + ... + 3983631.

It is an arithmetic number, because the mean of its divisors is an integer number (215108460).

Almost surely, 2^1131311018 is an apocalyptic number.

1131311018 is a deficient number, since it is larger than the sum of its proper divisors (589556662).

1131311018 is an equidigital number, since it uses as much as digits as its factorization.

1131311018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7967052.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1131311018 is about 33634.9671918972. The cubic root of 1131311018 is about 1041.9830930437.

Adding to 1131311018 its reverse (8101131311), we get a palindrome (9232442329).

It can be divided in two parts, 113 and 1311018, that added together give a palindrome (1311131).

The spelling of 1131311018 in words is "one billion, one hundred thirty-one million, three hundred eleven thousand, eighteen".