1331520413 has 16 divisors (see below), whose sum is σ = 1430594880. Its totient is φ = 1236888576.

The previous prime is 1331520403. The next prime is 1331520433. The reversal of 1331520413 is 3140251331.

It is a cyclic number.

It is not a de Polignac number, because 1331520413 - 2¹⁰ = 1331519389 is a prime.

It is a super-2 number, since 2×1331520413² = 3545893220471381138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331520403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75581 + ... + 91517.

It is an arithmetic number, because the mean of its divisors is an integer number (89412180).

Almost surely, 2^1331520413 is an apocalyptic number.

It is an amenable number.

1331520413 is a deficient number, since it is larger than the sum of its proper divisors (99074467).

1331520413 is a wasteful number, since it uses less digits than its factorization.

1331520413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16076.

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

The square root of 1331520413 is about 36490.0042888460. The cubic root of 1331520413 is about 1100.1433457820.

Adding to 1331520413 its reverse (3140251331), we get a palindrome (4471771744).

The spelling of 1331520413 in words is "one billion, three hundred thirty-one million, five hundred twenty thousand, four hundred thirteen".