2159000384581 has 2 divisors, whose sum is σ = 2159000384582. Its totient is φ = 2159000384580.

The previous prime is 2159000384549. The next prime is 2159000384603. The reversal of 2159000384581 is 1854830009512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1894295279556 + 264705105025 = 1376334^2 + 514495^2 .

It is a cyclic number.

It is not a de Polignac number, because 2159000384581 - 2⁵ = 2159000384549 is a prime.

It is a super-2 number, since 2×2159000384581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2159000381581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079500192290 + 1079500192291.

It is an arithmetic number, because the mean of its divisors is an integer number (1079500192291).

Almost surely, 2^{2159000384581} is an apocalyptic number.

It is an amenable number.

2159000384581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2159000384581 is an equidigital number, since it uses as much as digits as its factorization.

2159000384581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 2159000384581 in words is "two trillion, one hundred fifty-nine billion, three hundred eighty-four thousand, five hundred eighty-one".