1515015139 has 4 divisors (see below), whose sum is σ = 1652743800. Its totient is φ = 1377286480.

The previous prime is 1515015127. The next prime is 1515015181. The reversal of 1515015139 is 9315105151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9315105151 = 11 ⋅846827741.

It is a cyclic number.

It is not a de Polignac number, because 1515015139 - 2¹³ = 1515006947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1515015139.

It is not an unprimeable number, because it can be changed into a prime (1515015199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68864314 + ... + 68864335.

It is an arithmetic number, because the mean of its divisors is an integer number (413185950).

Almost surely, 2^1515015139 is an apocalyptic number.

1515015139 is a deficient number, since it is larger than the sum of its proper divisors (137728661).

1515015139 is a wasteful number, since it uses less digits than its factorization.

1515015139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137728660.

The product of its (nonzero) digits is 3375, while the sum is 31.

The square root of 1515015139 is about 38923.1953852712. The cubic root of 1515015139 is about 1148.5211334404.

The spelling of 1515015139 in words is "one billion, five hundred fifteen million, fifteen thousand, one hundred thirty-nine".