1155535313 has 4 divisors (see below), whose sum is σ = 1161919668. Its totient is φ = 1149150960.

The previous prime is 1155535273. The next prime is 1155535319. The reversal of 1155535313 is 3135355511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3135355511 = 1193 ⋅2628127.

It can be written as a sum of positive squares in 2 ways, for example, as 27112849 + 1128422464 = 5207^2 + 33592^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155535313 - 2¹⁴ = 1155518929 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 1155535313.

It is not an unprimeable number, because it can be changed into a prime (1155535319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3191906 + ... + 3192267.

It is an arithmetic number, because the mean of its divisors is an integer number (290479917).

Almost surely, 2^1155535313 is an apocalyptic number.

It is an amenable number.

1155535313 is a deficient number, since it is larger than the sum of its proper divisors (6384355).

1155535313 is an equidigital number, since it uses as much as digits as its factorization.

1155535313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6384354.

The product of its digits is 16875, while the sum is 32.

The square root of 1155535313 is about 33993.1656807659. The cubic root of 1155535313 is about 1049.3678168822.

The spelling of 1155535313 in words is "one billion, one hundred fifty-five million, five hundred thirty-five thousand, three hundred thirteen".