2159432067281 has 4 divisors (see below), whose sum is σ = 2159653126500. Its totient is φ = 2159211008064.

The previous prime is 2159432067277. The next prime is 2159432067283. The reversal of 2159432067281 is 1827602349512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 507991180225 + 1651440887056 = 712735^2 + 1285084^2 .

It is a cyclic number.

It is not a de Polignac number, because 2159432067281 - 2² = 2159432067277 is a prime.

It is a super-2 number, since 2×2159432067281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2159432067283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110514956 + ... + 110534493.

It is an arithmetic number, because the mean of its divisors is an integer number (539913281625).

It is a 1-persistent number, because it is pandigital, but 2⋅2159432067281 = 4318864134562 is not.

Almost surely, 2^{2159432067281} is an apocalyptic number.

It is an amenable number.

2159432067281 is a deficient number, since it is larger than the sum of its proper divisors (221059219).

2159432067281 is an equidigital number, since it uses as much as digits as its factorization.

2159432067281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221059218.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 2159432067281 in words is "two trillion, one hundred fifty-nine billion, four hundred thirty-two million, sixty-seven thousand, two hundred eighty-one".