2188225 has 12 divisors (see below), whose sum is σ = 2922556. Its totient is φ = 1615680.

The previous prime is 2188213. The next prime is 2188231. The reversal of 2188225 is 5228812.

It can be written as a sum of positive squares in 6 ways, for example, as 784 + 2187441 = 28^2 + 1479^2 .

It is not a de Polignac number, because 2188225 - 2¹³ = 2180033 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2188193 and 2188202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3042 + ... + 3691.

2^2188225 is an apocalyptic number.

2188225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2188225 is a deficient number, since it is larger than the sum of its proper divisors (734331).

2188225 is a wasteful number, since it uses less digits than its factorization.

2188225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6756 (or 6751 counting only the distinct ones).

The product of its digits is 2560, while the sum is 28.

The square root of 2188225 is about 1479.2650202043. The cubic root of 2188225 is about 129.8266921364.

The spelling of 2188225 in words is "two million, one hundred eighty-eight thousand, two hundred twenty-five".