1311291330 has 32 divisors (see below), whose sum is σ = 3153596544. Its totient is φ = 348955776.

The previous prime is 1311291307. The next prime is 1311291431. The reversal of 1311291330 is 331921131.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311291330.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30267 + ... + 59486.

It is an arithmetic number, because the mean of its divisors is an integer number (98549892).

Almost surely, 2^1311291330 is an apocalyptic number.

1311291330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311291330 is an abundant number, since it is smaller than the sum of its proper divisors (1842305214).

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

1311291330 is a wasteful number, since it uses less digits than its factorization.

1311291330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90250.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 1311291330 is about 36211.7567925115. The cubic root of 1311291330 is about 1094.5435932824.

The spelling of 1311291330 in words is "one billion, three hundred eleven million, two hundred ninety-one thousand, three hundred thirty".