1331513441 has 4 divisors (see below), whose sum is σ = 1331622084. Its totient is φ = 1331404800.

The previous prime is 1331513411. The next prime is 1331513461. The reversal of 1331513441 is 1443151331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 720385600 + 611127841 = 26840^2 + 24721^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331513441 - 2⁶ = 1331513377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331513441.

It is not an unprimeable number, because it can be changed into a prime (1331513411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33200 + ... + 61361.

It is an arithmetic number, because the mean of its divisors is an integer number (332905521).

Almost surely, 2^1331513441 is an apocalyptic number.

It is an amenable number.

1331513441 is a deficient number, since it is larger than the sum of its proper divisors (108643).

1331513441 is an equidigital number, since it uses as much as digits as its factorization.

1331513441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108642.

The product of its digits is 2160, while the sum is 26.

The square root of 1331513441 is about 36489.9087557094. The cubic root of 1331513441 is about 1100.1414256180.

Adding to 1331513441 its reverse (1443151331), we get a palindrome (2774664772).

The spelling of 1331513441 in words is "one billion, three hundred thirty-one million, five hundred thirteen thousand, four hundred forty-one".