2221686 has 12 divisors (see below), whose sum is σ = 4813692. Its totient is φ = 740556.

The previous prime is 2221673. The next prime is 2221699. The reversal of 2221686 is 6861222.

It is an interprime number because it is at equal distance from previous prime (2221673) and next prime (2221699).

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

It is a congruent number.

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, 61696 + ... + 61731.

It is an arithmetic number, because the mean of its divisors is an integer number (401141).

2^2221686 is an apocalyptic number.

2221686 is an abundant number, since it is smaller than the sum of its proper divisors (2592006).

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

2221686 is a wasteful number, since it uses less digits than its factorization.

2221686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123435 (or 123432 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 2221686 is about 1490.5321197478. The cubic root of 2221686 is about 130.4850909995.

The spelling of 2221686 in words is "two million, two hundred twenty-one thousand, six hundred eighty-six".