2221916 has 12 divisors (see below), whose sum is σ = 3926832. Its totient is φ = 1099968.

The previous prime is 2221909. The next prime is 2221931. The reversal of 2221916 is 6191222.

It is a super-2 number, since 2×2221916² = 9873821422112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221891 and 2221900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2285 + ... + 3108.

It is an arithmetic number, because the mean of its divisors is an integer number (327236).

2^2221916 is an apocalyptic number.

It is an amenable number.

2221916 is a deficient number, since it is larger than the sum of its proper divisors (1704916).

2221916 is a wasteful number, since it uses less digits than its factorization.

2221916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500 (or 5498 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 2221916 is about 1490.6092714055. The cubic root of 2221916 is about 130.4895936663.

The spelling of 2221916 in words is "two million, two hundred twenty-one thousand, nine hundred sixteen".