2156589187 has 2 divisors, whose sum is σ = 2156589188. Its totient is φ = 2156589186.

The previous prime is 2156589161. The next prime is 2156589221. The reversal of 2156589187 is 7819856512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2156589187 is a prime.

It is not a weakly prime, because it can be changed into another prime (2156589137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078294593 + 1078294594.

It is an arithmetic number, because the mean of its divisors is an integer number (1078294594).

Almost surely, 2^2156589187 is an apocalyptic number.

2156589187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156589187 is an equidigital number, since it uses as much as digits as its factorization.

2156589187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 52.

The square root of 2156589187 is about 46439.0911517441. The cubic root of 2156589187 is about 1291.9800505807.

The spelling of 2156589187 in words is "two billion, one hundred fifty-six million, five hundred eighty-nine thousand, one hundred eighty-seven".