1131301218 has 16 divisors (see below), whose sum is σ = 2305293696. Its totient is φ = 369985200.

The previous prime is 1131301169. The next prime is 1131301219. The reversal of 1131301218 is 8121031311.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1131301194 and 1131301203.

It is not an unprimeable number, because it can be changed into a prime (1131301219) 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, 1778458 + ... + 1779093.

It is an arithmetic number, because the mean of its divisors is an integer number (144080856).

Almost surely, 2^1131301218 is an apocalyptic number.

1131301218 is an abundant number, since it is smaller than the sum of its proper divisors (1173992478).

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

1131301218 is a wasteful number, since it uses less digits than its factorization.

1131301218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557609.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1131301218 is about 33634.8215098579. The cubic root of 1131301218 is about 1041.9800843032.

Adding to 1131301218 its reverse (8121031311), we get a palindrome (9252332529).

The spelling of 1131301218 in words is "one billion, one hundred thirty-one million, three hundred one thousand, two hundred eighteen".