2189557 has 4 divisors (see below), whose sum is σ = 2201836. Its totient is φ = 2177280.

The previous prime is 2189543. The next prime is 2189563. The reversal of 2189557 is 7559812.

2189557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40401 + 2149156 = 201^2 + 1466^2 .

It is a cyclic number.

It is not a de Polignac number, because 2189557 - 2¹⁵ = 2156789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189357) 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 in 3 ways as a sum of consecutive naturals, for example, 5868 + ... + 6229.

It is an arithmetic number, because the mean of its divisors is an integer number (550459).

2^2189557 is an apocalyptic number.

It is an amenable number.

2189557 is a deficient number, since it is larger than the sum of its proper divisors (12279).

2189557 is a wasteful number, since it uses less digits than its factorization.

2189557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12278.

The product of its digits is 25200, while the sum is 37.

The square root of 2189557 is about 1479.7151752956. The cubic root of 2189557 is about 129.8530291718.

It can be divided in two parts, 21895 and 57, that added together give a cube (21952 = 28³).

The spelling of 2189557 in words is "two million, one hundred eighty-nine thousand, five hundred fifty-seven".