1312611553 has 8 divisors (see below), whose sum is σ = 1432209600. Its totient is φ = 1193058480.

The previous prime is 1312611491. The next prime is 1312611563. The reversal of 1312611553 is 3551162131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312611553 - 2¹³ = 1312603361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312611563) 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 7 ways as a sum of consecutive naturals, for example, 87651 + ... + 101527.

It is an arithmetic number, because the mean of its divisors is an integer number (179026200).

Almost surely, 2^1312611553 is an apocalyptic number.

It is an amenable number.

1312611553 is a deficient number, since it is larger than the sum of its proper divisors (119598047).

1312611553 is a wasteful number, since it uses less digits than its factorization.

1312611553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22487.

The product of its digits is 2700, while the sum is 28.

The square root of 1312611553 is about 36229.9814104286. The cubic root of 1312611553 is about 1094.9108030455.

Adding to 1312611553 its reverse (3551162131), we get a palindrome (4863773684).

The spelling of 1312611553 in words is "one billion, three hundred twelve million, six hundred eleven thousand, five hundred fifty-three".