1331516431 has 16 divisors (see below), whose sum is σ = 1539155520. Its totient is φ = 1128268800.

The previous prime is 1331516429. The next prime is 1331516443. The reversal of 1331516431 is 1346151331.

It is a cyclic number.

It is not a de Polignac number, because 1331516431 - 2¹ = 1331516429 is a prime.

It is a super-2 number, since 2×1331516431² = 3545872012045955522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1331516431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331516491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 703935 + ... + 705823.

It is an arithmetic number, because the mean of its divisors is an integer number (96197220).

Almost surely, 2^1331516431 is an apocalyptic number.

1331516431 is a deficient number, since it is larger than the sum of its proper divisors (207639089).

1331516431 is a wasteful number, since it uses less digits than its factorization.

1331516431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994.

The product of its digits is 3240, while the sum is 28.

The square root of 1331516431 is about 36489.9497259177. The cubic root of 1331516431 is about 1100.1422490970.

Adding to 1331516431 its reverse (1346151331), we get a palindrome (2677667762).

The spelling of 1331516431 in words is "one billion, three hundred thirty-one million, five hundred sixteen thousand, four hundred thirty-one".