1515000139 has 4 divisors (see below), whose sum is σ = 1515097240. Its totient is φ = 1514903040.

The previous prime is 1515000127. The next prime is 1515000161. The reversal of 1515000139 is 9310005151.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9310005151 = 27437 ⋅339323.

It is a cyclic number.

It is not a de Polignac number, because 1515000139 - 2¹¹ = 1514998091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1515000239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19254 + ... + 58315.

It is an arithmetic number, because the mean of its divisors is an integer number (378774310).

Almost surely, 2^1515000139 is an apocalyptic number.

1515000139 is a deficient number, since it is larger than the sum of its proper divisors (97101).

1515000139 is an equidigital number, since it uses as much as digits as its factorization.

1515000139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97100.

The product of its (nonzero) digits is 675, while the sum is 25.

The square root of 1515000139 is about 38923.0026976337. The cubic root of 1515000139 is about 1148.5173429669.

The spelling of 1515000139 in words is "one billion, five hundred fifteen million, one hundred thirty-nine", and thus it is an aban number.