1331240513 has 8 divisors (see below), whose sum is σ = 1350104448. Its totient is φ = 1312481664.

The previous prime is 1331240507. The next prime is 1331240527. The reversal of 1331240513 is 3150421331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331240513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331242513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581 + ... + 51602.

It is an arithmetic number, because the mean of its divisors is an integer number (168763056).

Almost surely, 2^1331240513 is an apocalyptic number.

It is an amenable number.

1331240513 is a deficient number, since it is larger than the sum of its proper divisors (18863935).

1331240513 is an equidigital number, since it uses as much as digits as its factorization.

1331240513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52543.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1331240513 is about 36486.1687903786. The cubic root of 1331240513 is about 1100.0662530343.

Adding to 1331240513 its reverse (3150421331), we get a palindrome (4481661844).

The spelling of 1331240513 in words is "one billion, three hundred thirty-one million, two hundred forty thousand, five hundred thirteen".