1311331230 has 48 divisors (see below), whose sum is σ = 3719415024. Its totient is φ = 317898240.

The previous prime is 1311331211. The next prime is 1311331237. The reversal of 1311331230 is 321331131.

It is a happy number.

1311331230 is a `hidden beast` number, since 1 + 311 + 331 + 23 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311331237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661299 + ... + 663278.

It is an arithmetic number, because the mean of its divisors is an integer number (77487813).

Almost surely, 2^1311331230 is an apocalyptic number.

1311331230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311331230 is an abundant number, since it is smaller than the sum of its proper divisors (2408083794).

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

1311331230 is a wasteful number, since it uses less digits than its factorization.

1311331230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324601 (or 1324598 counting only the distinct ones).

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

The square root of 1311331230 is about 36212.3077143669. The cubic root of 1311331230 is about 1094.5546947682.

Adding to 1311331230 its reverse (321331131), we get a palindrome (1632662361).

Subtracting from 1311331230 its reverse (321331131), we obtain a palindrome (990000099).

The spelling of 1311331230 in words is "one billion, three hundred eleven million, three hundred thirty-one thousand, two hundred thirty".