2187225 has 18 divisors (see below), whose sum is σ = 3917966. Its totient is φ = 1166400.

The previous prime is 2187217. The next prime is 2187233. The reversal of 2187225 is 5227812.

It is an interprime number because it is at equal distance from previous prime (2187217) and next prime (2187233).

It can be written as a sum of positive squares in 3 ways, for example, as 8649 + 2178576 = 93^2 + 1476^2 .

It is not a de Polignac number, because 2187225 - 2³ = 2187217 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4636 + ... + 5085.

2^2187225 is an apocalyptic number.

2187225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2187225 is a deficient number, since it is larger than the sum of its proper divisors (1730741).

2187225 is a wasteful number, since it uses less digits than its factorization.

2187225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9737 (or 9729 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 2187225 is about 1478.9269758849. The cubic root of 2187225 is about 129.8069125626.

The spelling of 2187225 in words is "two million, one hundred eighty-seven thousand, two hundred twenty-five".