2189157 has 4 divisors (see below), whose sum is σ = 2918880. Its totient is φ = 1459436.

The previous prime is 2189153. The next prime is 2189167. The reversal of 2189157 is 7519812.

2189157 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2189157 - 2² = 2189153 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189153) 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, 364857 + ... + 364862.

It is an arithmetic number, because the mean of its divisors is an integer number (729720).

2^2189157 is an apocalyptic number.

It is an amenable number.

2189157 is a deficient number, since it is larger than the sum of its proper divisors (729723).

2189157 is an equidigital number, since it uses as much as digits as its factorization.

2189157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729722.

The product of its digits is 5040, while the sum is 33.

The square root of 2189157 is about 1479.5800079752. The cubic root of 2189157 is about 129.8451212746.

It can be divided in two parts, 2189 and 157, that added together give a triangular number (2346 = T₆₈).

The spelling of 2189157 in words is "two million, one hundred eighty-nine thousand, one hundred fifty-seven".