115031221555 has 8 divisors (see below), whose sum is σ = 139030542000. Its totient is φ = 91362926496.

The previous prime is 115031221537. The next prime is 115031221559. The reversal of 115031221555 is 555122130511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115031221555 - 2⁹ = 115031221043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115031221559) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 82755580 + ... + 82756969.

It is an arithmetic number, because the mean of its divisors is an integer number (17378817750).

Almost surely, 2^115031221555 is an apocalyptic number.

115031221555 is a deficient number, since it is larger than the sum of its proper divisors (23999320445).

115031221555 is a wasteful number, since it uses less digits than its factorization.

115031221555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165512693.

The product of its (nonzero) digits is 7500, while the sum is 31.

The spelling of 115031221555 in words is "one hundred fifteen billion, thirty-one million, two hundred twenty-one thousand, five hundred fifty-five".