138515519 has 8 divisors (see below), whose sum is σ = 140593920. Its totient is φ = 136445400.

The previous prime is 138515501. The next prime is 138515527. The reversal of 138515519 is 915515831.

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

It is a cyclic number.

It is not a de Polignac number, because 138515519 - 2²⁴ = 121738303 is a prime.

It is a super-2 number, since 2×138515519² = 38373098007678722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138515569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37004 + ... + 40574.

It is an arithmetic number, because the mean of its divisors is an integer number (17574240).

Almost surely, 2^138515519 is an apocalyptic number.

138515519 is a deficient number, since it is larger than the sum of its proper divisors (2078401).

138515519 is an equidigital number, since it uses as much as digits as its factorization.

138515519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141.

The product of its digits is 27000, while the sum is 38.

The square root of 138515519 is about 11769.2616166011. The cubic root of 138515519 is about 517.4076090439.

The spelling of 138515519 in words is "one hundred thirty-eight million, five hundred fifteen thousand, five hundred nineteen".