2221685 has 8 divisors (see below), whose sum is σ = 2782080. Its totient is φ = 1699984.

The previous prime is 2221673. The next prime is 2221699. The reversal of 2221685 is 5861222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2221685 - 2⁴ = 2221669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9545 + ... + 9774.

It is an arithmetic number, because the mean of its divisors is an integer number (347760).

2^2221685 is an apocalyptic number.

It is an amenable number.

2221685 is a deficient number, since it is larger than the sum of its proper divisors (560395).

2221685 is a wasteful number, since it uses less digits than its factorization.

2221685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19347.

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

The square root of 2221685 is about 1490.5317842971. The cubic root of 2221685 is about 130.4850714220.

The spelling of 2221685 in words is "two million, two hundred twenty-one thousand, six hundred eighty-five".