138018315 has 8 divisors (see below), whose sum is σ = 220829328. Its totient is φ = 73609760.

The previous prime is 138018301. The next prime is 138018323. The reversal of 138018315 is 513810831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138018315 - 2¹⁰ = 138017291 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4600596 + ... + 4600625.

It is an arithmetic number, because the mean of its divisors is an integer number (27603666).

Almost surely, 2^138018315 is an apocalyptic number.

138018315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138018315 is a deficient number, since it is larger than the sum of its proper divisors (82811013).

138018315 is an equidigital number, since it uses as much as digits as its factorization.

138018315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9201229.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 138018315 is about 11748.1196367759. The cubic root of 138018315 is about 516.7877854560.

The spelling of 138018315 in words is "one hundred thirty-eight million, eighteen thousand, three hundred fifteen".