138480515 has 4 divisors (see below), whose sum is σ = 166176624. Its totient is φ = 110784408.

The previous prime is 138480509. The next prime is 138480527. The reversal of 138480515 is 515084831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515084831 = 43 ⋅11978717.

It is a cyclic number.

It is not a de Polignac number, because 138480515 - 2¹⁸ = 138218371 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13848047 + ... + 13848056.

It is an arithmetic number, because the mean of its divisors is an integer number (41544156).

Almost surely, 2^138480515 is an apocalyptic number.

138480515 is a deficient number, since it is larger than the sum of its proper divisors (27696109).

138480515 is an equidigital number, since it uses as much as digits as its factorization.

138480515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27696108.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 138480515 is about 11767.7744284975. The cubic root of 138480515 is about 517.3640209994.

The spelling of 138480515 in words is "one hundred thirty-eight million, four hundred eighty thousand, five hundred fifteen".