15145205105 has 4 divisors (see below), whose sum is σ = 18174246132. Its totient is φ = 12116164080.

The previous prime is 15145205039. The next prime is 15145205149. The reversal of 15145205105 is 50150254151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50150254151 = 263 ⋅190685377.

It can be written as a sum of positive squares in 2 ways, for example, as 2759295841 + 12385909264 = 52529^2 + 111292^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15145205105 is a prime.

It is a super-2 number, since 2×15145205105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1514520506 + ... + 1514520515.

It is an arithmetic number, because the mean of its divisors is an integer number (4543561533).

Almost surely, 2^15145205105 is an apocalyptic number.

It is an amenable number.

15145205105 is a deficient number, since it is larger than the sum of its proper divisors (3029041027).

15145205105 is an equidigital number, since it uses as much as digits as its factorization.

15145205105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029041026.

The product of its (nonzero) digits is 5000, while the sum is 29.

Adding to 15145205105 its reverse (50150254151), we get a palindrome (65295459256).

The spelling of 15145205105 in words is "fifteen billion, one hundred forty-five million, two hundred five thousand, one hundred five".