2159557 has 2 divisors, whose sum is σ = 2159558. Its totient is φ = 2159556.

The previous prime is 2159551. The next prime is 2159609. The reversal of 2159557 is 7559512.

2159557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1934881 + 224676 = 1391^2 + 474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2159557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2159551) 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, 1079778 + 1079779.

It is an arithmetic number, because the mean of its divisors is an integer number (1079779).

2^2159557 is an apocalyptic number.

It is an amenable number.

2159557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2159557 is an equidigital number, since it uses as much as digits as its factorization.

2159557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15750, while the sum is 34.

The square root of 2159557 is about 1469.5431262811. The cubic root of 2159557 is about 129.2572436258.

The spelling of 2159557 in words is "two million, one hundred fifty-nine thousand, five hundred fifty-seven".