2221972 has 24 divisors (see below), whose sum is σ = 4064256. Its totient is φ = 1062048.

The previous prime is 2221969. The next prime is 2221981. The reversal of 2221972 is 2791222.

2221972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9853 + ... + 10075.

It is an arithmetic number, because the mean of its divisors is an integer number (169344).

2^2221972 is an apocalyptic number.

It is an amenable number.

2221972 is a deficient number, since it is larger than the sum of its proper divisors (1842284).

2221972 is a wasteful number, since it uses less digits than its factorization.

2221972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 325 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 2221972 is about 1490.6280555524. The cubic root of 2221972 is about 130.4906899207.

It can be divided in two parts, 22 and 21972, that multiplied together give a palindrome (483384).

The spelling of 2221972 in words is "two million, two hundred twenty-one thousand, nine hundred seventy-two".