138271563 has 36 divisors (see below), whose sum is σ = 214607160. Its totient is φ = 87985440.

The previous prime is 138271547. The next prime is 138271571. The reversal of 138271563 is 365172831.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

138271563 is a `hidden beast` number, since 13 + 82 + 7 + 1 + 563 = 666.

It is not a de Polignac number, because 138271563 - 2⁴ = 138271547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138271513) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1894095 + ... + 1894167.

It is an arithmetic number, because the mean of its divisors is an integer number (5961310).

Almost surely, 2^138271563 is an apocalyptic number.

138271563 is a deficient number, since it is larger than the sum of its proper divisors (76335597).

138271563 is an frugal number, since it uses more digits than its factorization.

138271563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 107 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 138271563 is about 11758.8929325851. The cubic root of 138271563 is about 517.1036747092.

The spelling of 138271563 in words is "one hundred thirty-eight million, two hundred seventy-one thousand, five hundred sixty-three".