2156214589 has 2 divisors, whose sum is σ = 2156214590. Its totient is φ = 2156214588.

The previous prime is 2156214581. The next prime is 2156214637. The reversal of 2156214589 is 9854126512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1567764025 + 588450564 = 39595^2 + 24258^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156214589 - 2³ = 2156214581 is a prime.

It is a super-2 number, since 2×2156214589² = 9298522707632877842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156214581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078107294 + 1078107295.

It is an arithmetic number, because the mean of its divisors is an integer number (1078107295).

Almost surely, 2^2156214589 is an apocalyptic number.

It is an amenable number.

2156214589 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156214589 is an equidigital number, since it uses as much as digits as its factorization.

2156214589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 43.

The square root of 2156214589 is about 46435.0577581206. The cubic root of 2156214589 is about 1291.9052409120.

The spelling of 2156214589 in words is "two billion, one hundred fifty-six million, two hundred fourteen thousand, five hundred eighty-nine".