115221555555 has 16 divisors (see below), whose sum is σ = 184739374080. Its totient is φ = 61323201248.

The previous prime is 115221555541. The next prime is 115221555593. The reversal of 115221555555 is 555555122511.

It is a cyclic number.

It is not a de Polignac number, because 115221555555 - 2¹⁰ = 115221554531 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8011017 + ... + 8025386.

It is an arithmetic number, because the mean of its divisors is an integer number (11546210880).

Almost surely, 2^115221555555 is an apocalyptic number.

115221555555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115221555555 is a deficient number, since it is larger than the sum of its proper divisors (69517818525).

115221555555 is a wasteful number, since it uses less digits than its factorization.

115221555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16036890.

The product of its digits is 312500, while the sum is 42.

The spelling of 115221555555 in words is "one hundred fifteen billion, two hundred twenty-one million, five hundred fifty-five thousand, five hundred fifty-five".