9997222 has 4 divisors (see below), whose sum is σ = 14995836. Its totient is φ = 4998610.

The previous prime is 9997219. The next prime is 9997237. The reversal of 9997222 is 2227999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2227999 = 1187 ⋅1877.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 10.

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 as a sum of consecutive naturals, namely, 2499304 + ... + 2499307.

It is an arithmetic number, because the mean of its divisors is an integer number (3748959).

Almost surely, 2^9997222 is an apocalyptic number.

9997222 is a deficient number, since it is larger than the sum of its proper divisors (4998614).

9997222 is a wasteful number, since it uses less digits than its factorization.

9997222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998613.

The product of its digits is 40824, while the sum is 40.

The square root of 9997222 is about 3161.8383892919. The cubic root of 9997222 is about 215.4235170903.

The spelling of 9997222 in words is "nine million, nine hundred ninety-seven thousand, two hundred twenty-two".