1155221615015 has 8 divisors (see below), whose sum is σ = 1492901779488. Its totient is φ = 853086731040.

The previous prime is 1155221614973. The next prime is 1155221615047. The reversal of 1155221615015 is 5105161225511.

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

It is not a de Polignac number, because 1155221615015 - 2¹⁰ = 1155221613991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8886320051 + ... + 8886320180.

It is an arithmetic number, because the mean of its divisors is an integer number (186612722436).

Almost surely, 2^{1155221615015} is an apocalyptic number.

1155221615015 is a deficient number, since it is larger than the sum of its proper divisors (337680164473).

1155221615015 is a wasteful number, since it uses less digits than its factorization.

1155221615015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17772640249.

The product of its (nonzero) digits is 15000, while the sum is 35.

The spelling of 1155221615015 in words is "one trillion, one hundred fifty-five billion, two hundred twenty-one million, six hundred fifteen thousand, fifteen".