2005156215571 has 16 divisors (see below), whose sum is σ = 2087359084800. Its totient is φ = 1924595533728.

The previous prime is 2005156215551. The next prime is 2005156215589. The reversal of 2005156215571 is 1755126515002.

It is a cyclic number.

It is not a de Polignac number, because 2005156215571 - 2⁵ = 2005156215539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005156215551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6566145 + ... + 6864733.

It is an arithmetic number, because the mean of its divisors is an integer number (130459942800).

Almost surely, 2^{2005156215571} is an apocalyptic number.

2005156215571 is a deficient number, since it is larger than the sum of its proper divisors (82202869229).

2005156215571 is a wasteful number, since it uses less digits than its factorization.

2005156215571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301338.

The product of its (nonzero) digits is 105000, while the sum is 40.

The spelling of 2005156215571 in words is "two trillion, five billion, one hundred fifty-six million, two hundred fifteen thousand, five hundred seventy-one".