2221556 has 12 divisors (see below), whose sum is σ = 4092480. Its totient is φ = 1052280.

The previous prime is 2221523. The next prime is 2221567. The reversal of 2221556 is 6551222.

It is a super-2 number, since 2×2221556² = 9870622122272, which contains 22 as substring.

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, 14540 + ... + 14691.

It is an arithmetic number, because the mean of its divisors is an integer number (341040).

2^2221556 is an apocalyptic number.

It is an amenable number.

2221556 is a deficient number, since it is larger than the sum of its proper divisors (1870924).

2221556 is a wasteful number, since it uses less digits than its factorization.

2221556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29254 (or 29252 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 2221556 is about 1490.4885105226. The cubic root of 2221556 is about 130.4825458764.

Adding to 2221556 its reverse (6551222), we get a palindrome (8772778).

The spelling of 2221556 in words is "two million, two hundred twenty-one thousand, five hundred fifty-six".