180538033 has 4 divisors (see below), whose sum is σ = 194425588. Its totient is φ = 166650480.

The previous prime is 180538027. The next prime is 180538069. The reversal of 180538033 is 330835081.

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 100560784 + 79977249 = 10028^2 + 8943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180538033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 180537986 and 180538004.

It is not an unprimeable number, because it can be changed into a prime (180538003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6943758 + ... + 6943783.

It is an arithmetic number, because the mean of its divisors is an integer number (48606397).

Almost surely, 2^180538033 is an apocalyptic number.

180538033 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

180538033 is a deficient number, since it is larger than the sum of its proper divisors (13887555).

180538033 is a wasteful number, since it uses less digits than its factorization.

180538033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13887554.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 180538033 is about 13436.4442096858. Note that the first 3 decimals coincide. The cubic root of 180538033 is about 565.1836226726.

The spelling of 180538033 in words is "one hundred eighty million, five hundred thirty-eight thousand, thirty-three".