15540222155 has 24 divisors (see below), whose sum is σ = 19822454592. Its totient is φ = 11693371392.

The previous prime is 15540222149. The next prime is 15540222179. The reversal of 15540222155 is 55122204551.

It is a happy number.

It is not a de Polignac number, because 15540222155 - 2⁶ = 15540222091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3441179 + ... + 3445691.

It is an arithmetic number, because the mean of its divisors is an integer number (825935608).

Almost surely, 2^15540222155 is an apocalyptic number.

15540222155 is a deficient number, since it is larger than the sum of its proper divisors (4282232437).

15540222155 is a wasteful number, since it uses less digits than its factorization.

15540222155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6935 (or 6918 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 15540222155 in words is "fifteen billion, five hundred forty million, two hundred twenty-two thousand, one hundred fifty-five".