138552219 has 12 divisors (see below), whose sum is σ = 215525856. Its totient is φ = 85262832.

The previous prime is 138552217. The next prime is 138552223. The reversal of 138552219 is 912255831.

It is not a de Polignac number, because 138552219 - 2¹ = 138552217 is a prime.

It is a super-2 number, since 2×138552219² = 38393434779647922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138552217) 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 11 ways as a sum of consecutive naturals, for example, 591987 + ... + 592220.

It is an arithmetic number, because the mean of its divisors is an integer number (17960488).

Almost surely, 2^138552219 is an apocalyptic number.

138552219 is a deficient number, since it is larger than the sum of its proper divisors (76973637).

138552219 is a wasteful number, since it uses less digits than its factorization.

138552219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184226 (or 1184223 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 138552219 is about 11770.8206595802. The cubic root of 138552219 is about 517.4533011141.

The spelling of 138552219 in words is "one hundred thirty-eight million, five hundred fifty-two thousand, two hundred nineteen".