2218125 has 60 divisors (see below), whose sum is σ = 4573536. Its totient is φ = 936000.

The previous prime is 2218121. The next prime is 2218127. The reversal of 2218125 is 5218122.

2218125 = T₇₀ + T₇₁ + ... + T₂₃₈.

It is a happy number.

It is not a de Polignac number, because 2218125 - 2² = 2218121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218121) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 170619 + ... + 170631.

2^2218125 is an apocalyptic number.

2218125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2218125 is an abundant number, since it is smaller than the sum of its proper divisors (2355411).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2218125 is an equidigital number, since it uses as much as digits as its factorization.

2218125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 28 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 2218125 is about 1489.3371008606. The cubic root of 2218125 is about 130.4153382851.

Multiplying 2218125 by its sum of digits (21), we get a square (46580625 = 6825²).

2218125 divided by its sum of digits (21) gives a square (105625 = 325²).

The spelling of 2218125 in words is "two million, two hundred eighteen thousand, one hundred twenty-five".