139015915321 has 8 divisors (see below), whose sum is σ = 142415779464. Its totient is φ = 135616490880.

The previous prime is 139015915319. The next prime is 139015915417. The reversal of 139015915321 is 123519510931.

It can be written as a sum of positive squares in 4 ways, for example, as 2311205625 + 136704709696 = 48075^2 + 369736^2 .

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 139015915321 - 2¹ = 139015915319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139015913321) 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, 582855 + ... + 785971.

It is an arithmetic number, because the mean of its divisors is an integer number (17801972433).

Almost surely, 2^139015915321 is an apocalyptic number.

It is an amenable number.

139015915321 is a deficient number, since it is larger than the sum of its proper divisors (3399864143).

139015915321 is a wasteful number, since it uses less digits than its factorization.

139015915321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219851.

The product of its (nonzero) digits is 36450, while the sum is 40.

The spelling of 139015915321 in words is "one hundred thirty-nine billion, fifteen million, nine hundred fifteen thousand, three hundred twenty-one".