15122122209 has 12 divisors (see below), whose sum is σ = 22375823652. Its totient is φ = 9835526400.

The previous prime is 15122122159. The next prime is 15122122229. The reversal of 15122122209 is 90222122151.

It is a happy number.

15122122209 is a `hidden beast` number, since 1 + 512 + 2 + 122 + 20 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1221712209 + 13900410000 = 34953^2 + 117900^2 .

It is not a de Polignac number, because 15122122209 - 2¹¹ = 15122120161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15122122229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20490312 + ... + 20491049.

It is an arithmetic number, because the mean of its divisors is an integer number (1864651971).

Almost surely, 2^15122122209 is an apocalyptic number.

It is an amenable number.

15122122209 is a deficient number, since it is larger than the sum of its proper divisors (7253701443).

15122122209 is a wasteful number, since it uses less digits than its factorization.

15122122209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40981408 (or 40981405 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 15122122209 in words is "fifteen billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred nine".