15072731513 has 4 divisors (see below), whose sum is σ = 17225978880. Its totient is φ = 12919484148.

The previous prime is 15072731501. The next prime is 15072731537. The reversal of 15072731513 is 31513727051.

15072731513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31513727051 = 19301 ⋅1632751.

It is a cyclic number.

It is not a de Polignac number, because 15072731513 - 2⁶ = 15072731449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15072731213) 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, 1076623673 + ... + 1076623686.

It is an arithmetic number, because the mean of its divisors is an integer number (4306494720).

Almost surely, 2^15072731513 is an apocalyptic number.

It is an amenable number.

15072731513 is a deficient number, since it is larger than the sum of its proper divisors (2153247367).

15072731513 is an equidigital number, since it uses as much as digits as its factorization.

15072731513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153247366.

The product of its (nonzero) digits is 22050, while the sum is 35.

The spelling of 15072731513 in words is "fifteen billion, seventy-two million, seven hundred thirty-one thousand, five hundred thirteen".