2164244050521 has 36 divisors (see below), whose sum is σ = 3668700582612. Its totient is φ = 1225766513664.

The previous prime is 2164244050519. The next prime is 2164244050531. The reversal of 2164244050521 is 1250504424612.

2164244050521 is a `hidden beast` number, since 2 + 1 + 6 + 42 + 4 + 40 + 50 + 521 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 403675976025 + 1760568074496 = 635355^2 + 1326864^2 .

It is not a de Polignac number, because 2164244050521 - 2¹ = 2164244050519 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2164244050511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21665136 + ... + 21764801.

It is an arithmetic number, because the mean of its divisors is an integer number (101908349517).

Almost surely, 2^{2164244050521} is an apocalyptic number.

2164244050521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2164244050521 is a deficient number, since it is larger than the sum of its proper divisors (1504456532091).

2164244050521 is a wasteful number, since it uses less digits than its factorization.

2164244050521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43430070 (or 43430060 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 2164244050521 in words is "two trillion, one hundred sixty-four billion, two hundred forty-four million, fifty thousand, five hundred twenty-one".