2151965066217 has 16 divisors (see below), whose sum is σ = 2885986355520. Its totient is φ = 1426294233792.

The previous prime is 2151965066197. The next prime is 2151965066227. The reversal of 2151965066217 is 7126605691512.

It is not a de Polignac number, because 2151965066217 - 2¹⁴ = 2151965049833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2151965066217.

It is not an unprimeable number, because it can be changed into a prime (2151965066227) 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, 16145634 + ... + 16278372.

It is an arithmetic number, because the mean of its divisors is an integer number (180374147220).

Almost surely, 2^{2151965066217} is an apocalyptic number.

It is an amenable number.

2151965066217 is a deficient number, since it is larger than the sum of its proper divisors (734021289303).

2151965066217 is a wasteful number, since it uses less digits than its factorization.

2151965066217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164152.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 2151965066217 in words is "two trillion, one hundred fifty-one billion, nine hundred sixty-five million, sixty-six thousand, two hundred seventeen".