1331313020 has 12 divisors (see below), whose sum is σ = 2795757384. Its totient is φ = 532525200.

The previous prime is 1331313013. The next prime is 1331313031. The reversal of 1331313020 is 203131331.

It is a self number, because there is not a number n which added to its sum of digits gives 1331313020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33282806 + ... + 33282845.

It is an arithmetic number, because the mean of its divisors is an integer number (232979782).

Almost surely, 2^1331313020 is an apocalyptic number.

1331313020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331313020 is an abundant number, since it is smaller than the sum of its proper divisors (1464444364).

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

1331313020 is a wasteful number, since it uses less digits than its factorization.

1331313020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66565660 (or 66565658 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 1331313020 is about 36487.1623999455. The cubic root of 1331313020 is about 1100.0862246460.

Adding to 1331313020 its reverse (203131331), we get a palindrome (1534444351).

The spelling of 1331313020 in words is "one billion, three hundred thirty-one million, three hundred thirteen thousand, twenty".