2278225 has 6 divisors (see below), whose sum is σ = 2825030. Its totient is φ = 1822560.

The previous prime is 2278217. The next prime is 2278229. The reversal of 2278225 is 5228722.

It can be written as a sum of positive squares in 3 ways, for example, as 123201 + 2155024 = 351^2 + 1468^2 .

It is not a de Polignac number, because 2278225 - 2³ = 2278217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2278193 and 2278202.

It is not an unprimeable number, because it can be changed into a prime (2278229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45540 + ... + 45589.

2^2278225 is an apocalyptic number.

2278225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2278225 is a deficient number, since it is larger than the sum of its proper divisors (546805).

2278225 is an equidigital number, since it uses as much as digits as its factorization.

2278225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91139 (or 91134 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 2278225 is about 1509.3790113818. The cubic root of 2278225 is about 131.5827234706.

The spelling of 2278225 in words is "two million, two hundred seventy-eight thousand, two hundred twenty-five".