1153533133 has 4 divisors (see below), whose sum is σ = 1153613308. Its totient is φ = 1153452960.

The previous prime is 1153533107. The next prime is 1153533137. The reversal of 1153533133 is 3313353511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3313353511 = 13 ⋅254873347.

It can be written as a sum of positive squares in 2 ways, for example, as 368524809 + 785008324 = 19197^2 + 28018^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153533133 - 2²⁵ = 1119978701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153533137) 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, 11898 + ... + 49483.

It is an arithmetic number, because the mean of its divisors is an integer number (288403327).

Almost surely, 2^1153533133 is an apocalyptic number.

It is an amenable number.

1153533133 is a deficient number, since it is larger than the sum of its proper divisors (80175).

1153533133 is an equidigital number, since it uses as much as digits as its factorization.

1153533133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80174.

The product of its digits is 6075, while the sum is 28.

The square root of 1153533133 is about 33963.7031697075. The cubic root of 1153533133 is about 1048.7613914813.

Adding to 1153533133 its reverse (3313353511), we get a palindrome (4466886644).

The spelling of 1153533133 in words is "one billion, one hundred fifty-three million, five hundred thirty-three thousand, one hundred thirty-three".