138271111 has 16 divisors (see below), whose sum is σ = 153498240. Its totient is φ = 123505120.

The previous prime is 138271097. The next prime is 138271139. The reversal of 138271111 is 111172831.

It is a cyclic number.

It is not a de Polignac number, because 138271111 - 2¹¹ = 138269063 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 (138271171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245316 + ... + 245878.

It is an arithmetic number, because the mean of its divisors is an integer number (9593640).

Almost surely, 2^138271111 is an apocalyptic number.

138271111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138271111 is a deficient number, since it is larger than the sum of its proper divisors (15227129).

138271111 is a wasteful number, since it uses less digits than its factorization.

138271111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926.

The product of its digits is 336, while the sum is 25.

The square root of 138271111 is about 11758.8737130730. The cubic root of 138271111 is about 517.1031112501.

The spelling of 138271111 in words is "one hundred thirty-eight million, two hundred seventy-one thousand, one hundred eleven".