2071551721515 has 32 divisors (see below), whose sum is σ = 3320718964992. Its totient is φ = 1102749360000.

The previous prime is 2071551721513. The next prime is 2071551721531. The reversal of 2071551721515 is 5151271551702.

It is not a de Polignac number, because 2071551721515 - 2¹ = 2071551721513 is a prime.

It is a super-2 number, since 2×2071551721515² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2071551721513) 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 31 ways as a sum of consecutive naturals, for example, 115198825 + ... + 115216805.

It is an arithmetic number, because the mean of its divisors is an integer number (103772467656).

Almost surely, 2^{2071551721515} is an apocalyptic number.

2071551721515 is a deficient number, since it is larger than the sum of its proper divisors (1249167243477).

2071551721515 is a wasteful number, since it uses less digits than its factorization.

2071551721515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32011.

The product of its (nonzero) digits is 122500, while the sum is 42.

It can be divided in two parts, 2071551 and 721515, that added together give a triangular number (2793066 = T₂₃₆₃).

The spelling of 2071551721515 in words is "two trillion, seventy-one billion, five hundred fifty-one million, seven hundred twenty-one thousand, five hundred fifteen".