22221490 has 16 divisors (see below), whose sum is σ = 40061952. Its totient is φ = 8874544.

The previous prime is 22221487. The next prime is 22221491. The reversal of 22221490 is 9412222.

It is not an unprimeable number, because it can be changed into a prime (22221491) 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 7 ways as a sum of consecutive naturals, for example, 6927 + ... + 9613.

It is an arithmetic number, because the mean of its divisors is an integer number (2503872).

Almost surely, 2^22221490 is an apocalyptic number.

22221490 is a deficient number, since it is larger than the sum of its proper divisors (17840462).

22221490 is a wasteful number, since it uses less digits than its factorization.

22221490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 22221490 is about 4713.9675433757. The cubic root of 22221490 is about 281.1411338326.

It can be divided in two parts, 222 and 21490, that added together give a palindrome (21712).

The spelling of 22221490 in words is "twenty-two million, two hundred twenty-one thousand, four hundred ninety".