2218625 has 8 divisors (see below), whose sum is σ = 2769000. Its totient is φ = 1774800.

The previous prime is 2218621. The next prime is 2218663. The reversal of 2218625 is 5268122.

It can be written as a sum of positive squares in 4 ways, for example, as 478864 + 1739761 = 692^2 + 1319^2 .

It is not a de Polignac number, because 2218625 - 2² = 2218621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2218594 and 2218603.

It is not an unprimeable number, because it can be changed into a prime (2218621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8750 + ... + 8999.

It is an arithmetic number, because the mean of its divisors is an integer number (346125).

2^2218625 is an apocalyptic number.

2218625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2218625 is a deficient number, since it is larger than the sum of its proper divisors (550375).

2218625 is an equidigital number, since it uses as much as digits as its factorization.

2218625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17764 (or 17754 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 2218625 is about 1489.5049513177. The cubic root of 2218625 is about 130.4251367666.

The spelling of 2218625 in words is "two million, two hundred eighteen thousand, six hundred twenty-five".