1312115553 has 24 divisors (see below), whose sum is σ = 2168240256. Its totient is φ = 749016000.

The previous prime is 1312115507. The next prime is 1312115587. The reversal of 1312115553 is 3555112131.

It is not a de Polignac number, because 1312115553 - 2¹³ = 1312107361 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1312115653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54853 + ... + 75053.

It is an arithmetic number, because the mean of its divisors is an integer number (90343344).

Almost surely, 2^1312115553 is an apocalyptic number.

It is an amenable number.

1312115553 is a deficient number, since it is larger than the sum of its proper divisors (856124703).

1312115553 is a wasteful number, since it uses less digits than its factorization.

1312115553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21245 (or 21242 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 1312115553 is about 36223.1356041964. The cubic root of 1312115553 is about 1094.7728733902.

Adding to 1312115553 its reverse (3555112131), we get a palindrome (4867227684).

The spelling of 1312115553 in words is "one billion, three hundred twelve million, one hundred fifteen thousand, five hundred fifty-three".