2167225 has 6 divisors (see below), whose sum is σ = 2687390. Its totient is φ = 1733760.

The previous prime is 2167189. The next prime is 2167237. The reversal of 2167225 is 5227612.

It can be written as a sum of positive squares in 3 ways, for example, as 441 + 2166784 = 21^2 + 1472^2 .

It is not a de Polignac number, because 2167225 - 2⁷ = 2167097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 86689 = 2167225 / (2 + 1 + 6 + 7 + 2 + 2 + 5).

2167225 is a lucky number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2167225.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43320 + ... + 43369.

2^2167225 is an apocalyptic number.

2167225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2167225 is a deficient number, since it is larger than the sum of its proper divisors (520165).

2167225 is an equidigital number, since it uses as much as digits as its factorization.

2167225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86699 (or 86694 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 2167225 is about 1472.1497885745. The cubic root of 2167225 is about 129.4100486930.

The spelling of 2167225 in words is "two million, one hundred sixty-seven thousand, two hundred twenty-five".