1155221605015 has 32 divisors (see below), whose sum is σ = 1502712446976. Its totient is φ = 850030346880.

The previous prime is 1155221605009. The next prime is 1155221605019. The reversal of 1155221605015 is 5105061225511.

It is not a de Polignac number, because 1155221605015 - 2³ = 1155221605007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155221605019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472287 + ... + 1591696.

It is an arithmetic number, because the mean of its divisors is an integer number (46959763968).

Almost surely, 2^{1155221605015} is an apocalyptic number.

1155221605015 is a deficient number, since it is larger than the sum of its proper divisors (347490841961).

1155221605015 is a wasteful number, since it uses less digits than its factorization.

1155221605015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064199.

The product of its (nonzero) digits is 15000, while the sum is 34.

The spelling of 1155221605015 in words is "one trillion, one hundred fifty-five billion, two hundred twenty-one million, six hundred five thousand, fifteen".