2159225 has 6 divisors (see below), whose sum is σ = 2677470. Its totient is φ = 1727360.

The previous prime is 2159207. The next prime is 2159231. The reversal of 2159225 is 5229512.

2159225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 53824 + 2105401 = 232^2 + 1451^2 .

It is not a de Polignac number, because 2159225 - 2¹² = 2155129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2159194 and 2159203.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 43160 + ... + 43209.

It is an arithmetic number, because the mean of its divisors is an integer number (446245).

2^2159225 is an apocalyptic number.

2159225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2159225 is a deficient number, since it is larger than the sum of its proper divisors (518245).

2159225 is an equidigital number, since it uses as much as digits as its factorization.

2159225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86379 (or 86374 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 2159225 is about 1469.4301616613. The cubic root of 2159225 is about 129.2506194888.

The spelling of 2159225 in words is "two million, one hundred fifty-nine thousand, two hundred twenty-five".