9221972 has 12 divisors (see below), whose sum is σ = 16169076. Its totient is φ = 4602240.

The previous prime is 9221959. The next prime is 9221983. The reversal of 9221972 is 2791229.

9221972 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 1359556 + 7862416 = 1166^2 + 2804^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572 + ... + 4332.

It is an arithmetic number, because the mean of its divisors is an integer number (1347423).

Almost surely, 2^9221972 is an apocalyptic number.

It is an amenable number.

9221972 is a deficient number, since it is larger than the sum of its proper divisors (6947104).

9221972 is a wasteful number, since it uses less digits than its factorization.

9221972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378 (or 4376 counting only the distinct ones).

The product of its digits is 4536, while the sum is 32.

The square root of 9221972 is about 3036.7699945831. The cubic root of 9221972 is about 209.7045884122.

The spelling of 9221972 in words is "nine million, two hundred twenty-one thousand, nine hundred seventy-two".