2156851559 has 2 divisors, whose sum is σ = 2156851560. Its totient is φ = 2156851558.

The previous prime is 2156851553. The next prime is 2156851637. The reversal of 2156851559 is 9551586512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156851559 - 2¹² = 2156847463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156851553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078425779 + 1078425780.

It is an arithmetic number, because the mean of its divisors is an integer number (1078425780).

Almost surely, 2^2156851559 is an apocalyptic number.

2156851559 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156851559 is an equidigital number, since it uses as much as digits as its factorization.

2156851559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540000, while the sum is 47.

The square root of 2156851559 is about 46441.9159703818. The cubic root of 2156851559 is about 1292.0324428252.

The spelling of 2156851559 in words is "two billion, one hundred fifty-six million, eight hundred fifty-one thousand, five hundred fifty-nine".