15122135205 has 24 divisors (see below), whose sum is σ = 27753567192. Its totient is φ = 7590718464.

The previous prime is 15122135183. The next prime is 15122135221. The reversal of 15122135205 is 50253122151.

15122135205 is a `hidden beast` number, since 1 + 5 + 122 + 13 + 520 + 5 = 666.

15122135205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7704275076 + 7417860129 = 87774^2 + 86127^2 .

It is not a de Polignac number, because 15122135205 - 2¹⁷ = 15122004133 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 9882984 + ... + 9884513.

It is an arithmetic number, because the mean of its divisors is an integer number (1156398633).

Almost surely, 2^15122135205 is an apocalyptic number.

15122135205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15122135205 is a deficient number, since it is larger than the sum of its proper divisors (12631431987).

15122135205 is a wasteful number, since it uses less digits than its factorization.

15122135205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19767525 (or 19767522 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 15122135205 its reverse (50253122151), we get a palindrome (65375257356).

The spelling of 15122135205 in words is "fifteen billion, one hundred twenty-two million, one hundred thirty-five thousand, two hundred five".