1331511748 has 48 divisors (see below), whose sum is σ = 2739842560. Its totient is φ = 554242176.

The previous prime is 1331511743. The next prime is 1331511749. The reversal of 1331511748 is 8471151331.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1331511743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1075786 + ... + 1077022.

Almost surely, 2^1331511748 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 1331511748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1369921280).

1331511748 is an abundant number, since it is smaller than the sum of its proper divisors (1408330812).

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

1331511748 is a wasteful number, since it uses less digits than its factorization.

1331511748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324 (or 2322 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 1331511748 is about 36489.8855575076. The cubic root of 1331511748 is about 1100.1409593465.

The spelling of 1331511748 in words is "one billion, three hundred thirty-one million, five hundred eleven thousand, seven hundred forty-eight".