138263201 has 4 divisors (see below), whose sum is σ = 138376212. Its totient is φ = 138150192.

The previous prime is 138263197. The next prime is 138263207. The reversal of 138263201 is 102362831.

138263201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64320400 + 73942801 = 8020^2 + 8599^2 .

It is a cyclic number.

It is not a de Polignac number, because 138263201 - 2² = 138263197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138263207) 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, 54650 + ... + 57123.

It is an arithmetic number, because the mean of its divisors is an integer number (34594053).

Almost surely, 2^138263201 is an apocalyptic number.

It is an amenable number.

138263201 is a deficient number, since it is larger than the sum of its proper divisors (113011).

138263201 is a wasteful number, since it uses less digits than its factorization.

138263201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113010.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 138263201 is about 11758.5373665265. The cubic root of 138263201 is about 517.0932505169.

The spelling of 138263201 in words is "one hundred thirty-eight million, two hundred sixty-three thousand, two hundred one".