138822615 has 12 divisors (see below), whose sum is σ = 240625944. Its totient is φ = 74038704.

The previous prime is 138822613. The next prime is 138822643. The reversal of 138822615 is 516228831.

It is a happy number.

138822615 is a `hidden beast` number, since 1 + 38 + 8 + 2 + 2 + 615 = 666.

It is not a de Polignac number, because 138822615 - 2¹ = 138822613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138822615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138822613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1542429 + ... + 1542518.

It is an arithmetic number, because the mean of its divisors is an integer number (20052162).

Almost surely, 2^138822615 is an apocalyptic number.

138822615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138822615 is a deficient number, since it is larger than the sum of its proper divisors (101803329).

138822615 is a wasteful number, since it uses less digits than its factorization.

138822615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084958 (or 3084955 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 138822615 is about 11782.3009212972. The cubic root of 138822615 is about 517.7896998677.

The spelling of 138822615 in words is "one hundred thirty-eight million, eight hundred twenty-two thousand, six hundred fifteen".