1311431330 has 128 divisors (see below), whose sum is σ = 2813045760. Its totient is φ = 435456000.

The previous prime is 1311431321. The next prime is 1311431389. The reversal of 1311431330 is 331341131.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4839095 + ... + 4839365.

It is an arithmetic number, because the mean of its divisors is an integer number (21976920).

Almost surely, 2^1311431330 is an apocalyptic number.

1311431330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311431330 is an abundant number, since it is smaller than the sum of its proper divisors (1501614430).

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

1311431330 is a wasteful number, since it uses less digits than its factorization.

1311431330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1311431330 is about 36213.6898147648. The cubic root of 1311431330 is about 1094.5825448732.

Adding to 1311431330 its reverse (331341131), we get a palindrome (1642772461).

It can be divided in two parts, 13114 and 31330, that added together give a palindrome (44444).

The spelling of 1311431330 in words is "one billion, three hundred eleven million, four hundred thirty-one thousand, three hundred thirty".