2221490 has 8 divisors (see below), whose sum is σ = 3998700. Its totient is φ = 888592.

The previous prime is 2221459. The next prime is 2221507. The reversal of 2221490 is 941222.

2221490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2199289 + 22201 = 1483^2 + 149^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111065 + ... + 111084.

2^2221490 is an apocalyptic number.

2221490 is a deficient number, since it is larger than the sum of its proper divisors (1777210).

2221490 is a wasteful number, since it uses less digits than its factorization.

2221490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222156.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2221490 is about 1490.4663699661. The cubic root of 2221490 is about 130.4812536990.

It can be divided in two parts, 22 and 21490, that added together give a palindrome (21512).

The spelling of 2221490 in words is "two million, two hundred twenty-one thousand, four hundred ninety".