183138533 has 4 divisors (see below), whose sum is σ = 183307488. Its totient is φ = 182969580.

The previous prime is 183138521. The next prime is 183138539. The reversal of 183138533 is 335831381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 335831381 = 14323 ⋅23447.

It is a cyclic number.

It is not a de Polignac number, because 183138533 - 2⁴ = 183138517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 183138493 and 183138502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (183138539) 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, 82841 + ... + 85022.

It is an arithmetic number, because the mean of its divisors is an integer number (45826872).

Almost surely, 2^183138533 is an apocalyptic number.

It is an amenable number.

183138533 is a deficient number, since it is larger than the sum of its proper divisors (168955).

183138533 is a wasteful number, since it uses less digits than its factorization.

183138533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168954.

The product of its digits is 25920, while the sum is 35.

The square root of 183138533 is about 13532.8686168159. The cubic root of 183138533 is about 567.8843630313.

The spelling of 183138533 in words is "one hundred eighty-three million, one hundred thirty-eight thousand, five hundred thirty-three".