138216195 has 48 divisors (see below), whose sum is σ = 259564032. Its totient is φ = 67633920.

The previous prime is 138216193. The next prime is 138216217. The reversal of 138216195 is 591612831.

138216195 is a `hidden beast` number, since 1 + 38 + 2 + 1 + 619 + 5 = 666.

It is not a de Polignac number, because 138216195 - 2¹ = 138216193 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138216191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 111117 + ... + 112353.

It is an arithmetic number, because the mean of its divisors is an integer number (5407584).

Almost surely, 2^138216195 is an apocalyptic number.

138216195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138216195 is a deficient number, since it is larger than the sum of its proper divisors (121347837).

138216195 is a wasteful number, since it uses less digits than its factorization.

138216195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452 (or 1449 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 138216195 is about 11756.5383935919. The cubic root of 138216195 is about 517.0346443218.

The spelling of 138216195 in words is "one hundred thirty-eight million, two hundred sixteen thousand, one hundred ninety-five".