15005215345 has 4 divisors (see below), whose sum is σ = 18006258420. Its totient is φ = 12004172272.

The previous prime is 15005215333. The next prime is 15005215349. The reversal of 15005215345 is 54351250051.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2263095184 + 12742120161 = 47572^2 + 112881^2 .

It is a cyclic number.

It is not a de Polignac number, because 15005215345 - 2⁷ = 15005215217 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (15005215349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500521530 + ... + 1500521539.

It is an arithmetic number, because the mean of its divisors is an integer number (4501564605).

Almost surely, 2^15005215345 is an apocalyptic number.

It is an amenable number.

15005215345 is a deficient number, since it is larger than the sum of its proper divisors (3001043075).

15005215345 is an equidigital number, since it uses as much as digits as its factorization.

15005215345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001043074.

The product of its (nonzero) digits is 15000, while the sum is 31.

Adding to 15005215345 its reverse (54351250051), we get a palindrome (69356465396).

The spelling of 15005215345 in words is "fifteen billion, five million, two hundred fifteen thousand, three hundred forty-five".