1311231330 has 24 divisors (see below), whose sum is σ = 3409201692. Its totient is φ = 349661664.

The previous prime is 1311231323. The next prime is 1311231343. The reversal of 1311231330 is 331321131.

It is a happy number.

1311231330 is a `hidden beast` number, since 1 + 311 + 23 + 1 + 330 = 666.

1311231330 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1205408961 + 105822369 = 34719^2 + 10287^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7284529 + ... + 7284708.

Almost surely, 2^1311231330 is an apocalyptic number.

1311231330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311231330 is an abundant number, since it is smaller than the sum of its proper divisors (2097970362).

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

1311231330 is a wasteful number, since it uses less digits than its factorization.

1311231330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14569250 (or 14569247 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1311231330 is about 36210.9283228144. The cubic root of 1311231330 is about 1094.5268988948.

Adding to 1311231330 its reverse (331321131), we get a palindrome (1642552461).

The spelling of 1311231330 in words is "one billion, three hundred eleven million, two hundred thirty-one thousand, three hundred thirty".