138533201 has 4 divisors (see below), whose sum is σ = 138716004. Its totient is φ = 138350400.

The previous prime is 138533183. The next prime is 138533231. The reversal of 138533201 is 102335831.

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 8116801 + 130416400 = 2849^2 + 11420^2 .

It is a cyclic number.

It is not a de Polignac number, because 138533201 - 2¹⁴ = 138516817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138533231) 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, 90260 + ... + 91781.

It is an arithmetic number, because the mean of its divisors is an integer number (34679001).

Almost surely, 2^138533201 is an apocalyptic number.

It is an amenable number.

138533201 is a deficient number, since it is larger than the sum of its proper divisors (182803).

138533201 is an equidigital number, since it uses as much as digits as its factorization.

138533201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182802.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 138533201 is about 11770.0127867390. The cubic root of 138533201 is about 517.4296244160.

The spelling of 138533201 in words is "one hundred thirty-eight million, five hundred thirty-three thousand, two hundred one".