2221550 has 24 divisors (see below), whose sum is σ = 4173096. Its totient is φ = 879840.

The previous prime is 2221523. The next prime is 2221567. The reversal of 2221550 is 551222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7709 + ... + 7991.

It is an arithmetic number, because the mean of its divisors is an integer number (173879).

2^2221550 is an apocalyptic number.

2221550 is a deficient number, since it is larger than the sum of its proper divisors (1951546).

2221550 is a wasteful number, since it uses less digits than its factorization.

2221550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2221550 is about 1490.4864977584. The cubic root of 2221550 is about 130.4824284068.

Adding to 2221550 its reverse (551222), we get a palindrome (2772772).

The spelling of 2221550 in words is "two million, two hundred twenty-one thousand, five hundred fifty".