2159481277 has 2 divisors, whose sum is σ = 2159481278. Its totient is φ = 2159481276.

The previous prime is 2159481257. The next prime is 2159481281. The reversal of 2159481277 is 7721849512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1982564676 + 176916601 = 44526^2 + 13301^2 .

It is a cyclic number.

It is not a de Polignac number, because 2159481277 - 2¹⁵ = 2159448509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2159481227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079740638 + 1079740639.

It is an arithmetic number, because the mean of its divisors is an integer number (1079740639).

Almost surely, 2^2159481277 is an apocalyptic number.

It is an amenable number.

2159481277 is a deficient number, since it is larger than the sum of its proper divisors (1).

2159481277 is an equidigital number, since it uses as much as digits as its factorization.

2159481277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 46.

The square root of 2159481277 is about 46470.2192484606. The cubic root of 2159481277 is about 1292.5573284360.

The spelling of 2159481277 in words is "two billion, one hundred fifty-nine million, four hundred eighty-one thousand, two hundred seventy-seven".