2221481 has 4 divisors (see below), whose sum is σ = 2224464. Its totient is φ = 2218500.

The previous prime is 2221459. The next prime is 2221507. The reversal of 2221481 is 1841222.

It is a happy number.

2221481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2221481 - 2¹⁰ = 2220457 is a prime.

It is a super-2 number, since 2×2221481² = 9869955666722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221411) by changing a digit.

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, 686 + ... + 2216.

It is an arithmetic number, because the mean of its divisors is an integer number (556116).

2^2221481 is an apocalyptic number.

It is an amenable number.

2221481 is a deficient number, since it is larger than the sum of its proper divisors (2983).

2221481 is a wasteful number, since it uses less digits than its factorization.

2221481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982.

The product of its digits is 256, while the sum is 20.

The square root of 2221481 is about 1490.4633507738. The cubic root of 2221481 is about 130.4810774910.

The spelling of 2221481 in words is "two million, two hundred twenty-one thousand, four hundred eighty-one".