1331211308 has 48 divisors (see below), whose sum is σ = 2741544960. Its totient is φ = 553646016.

The previous prime is 1331211281. The next prime is 1331211311. The reversal of 1331211308 is 8031121331.

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, 453341 + ... + 456267.

It is an arithmetic number, because the mean of its divisors is an integer number (57115520).

Almost surely, 2^1331211308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331211308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370772480).

1331211308 is an abundant number, since it is smaller than the sum of its proper divisors (1410333652).

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

1331211308 is a wasteful number, since it uses less digits than its factorization.

1331211308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414 (or 3412 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1331211308 is about 36485.7685680321. The cubic root of 1331211308 is about 1100.0582084900.

Adding to 1331211308 its reverse (8031121331), we get a palindrome (9362332639).

The spelling of 1331211308 in words is "one billion, three hundred thirty-one million, two hundred eleven thousand, three hundred eight".