1312513533 has 6 divisors (see below), whose sum is σ = 1895852894. Its totient is φ = 875009016.

The previous prime is 1312513507. The next prime is 1312513537. The reversal of 1312513533 is 3353152131.

1312513533 is a `hidden beast` number, since 1 + 3 + 125 + 1 + 3 + 533 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1312033284 + 480249 = 36222^2 + 693^2 .

It is not a de Polignac number, because 1312513533 - 2⁸ = 1312513277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312513497 and 1312513506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312513537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72917410 + ... + 72917427.

Almost surely, 2^1312513533 is an apocalyptic number.

It is an amenable number.

1312513533 is a deficient number, since it is larger than the sum of its proper divisors (583339361).

1312513533 is a wasteful number, since it uses less digits than its factorization.

1312513533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145834843 (or 145834840 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 1312513533 is about 36228.6286381364. The cubic root of 1312513533 is about 1094.8835480087.

Adding to 1312513533 its reverse (3353152131), we get a palindrome (4665665664).

The spelling of 1312513533 in words is "one billion, three hundred twelve million, five hundred thirteen thousand, five hundred thirty-three".