1155534133 has 4 divisors (see below), whose sum is σ = 1244421388. Its totient is φ = 1066646880.

The previous prime is 1155534113. The next prime is 1155534139. The reversal of 1155534133 is 3314355511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 687331089 + 468203044 = 26217^2 + 21638^2 .

It is not a de Polignac number, because 1155534133 - 2¹⁷ = 1155403061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1155534095 and 1155534104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155534139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44443608 + ... + 44443633.

It is an arithmetic number, because the mean of its divisors is an integer number (311105347).

Almost surely, 2^1155534133 is an apocalyptic number.

1155534133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1155534133 is a deficient number, since it is larger than the sum of its proper divisors (88887255).

1155534133 is an equidigital number, since it uses as much as digits as its factorization.

1155534133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88887254.

The product of its digits is 13500, while the sum is 31.

The square root of 1155534133 is about 33993.1483243315. The cubic root of 1155534133 is about 1049.3674596872.

Adding to 1155534133 its reverse (3314355511), we get a palindrome (4469889644).

The spelling of 1155534133 in words is "one billion, one hundred fifty-five million, five hundred thirty-four thousand, one hundred thirty-three".