7221897 has 12 divisors (see below), whose sum is σ = 10483824. Its totient is φ = 4790520.

The previous prime is 7221871. The next prime is 7221911. The reversal of 7221897 is 7981227.

7221897 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7221897 - 2⁷ = 7221769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7221847) 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 11 ways as a sum of consecutive naturals, for example, 3 + ... + 3800.

It is an arithmetic number, because the mean of its divisors is an integer number (873652).

Almost surely, 2^7221897 is an apocalyptic number.

It is an amenable number.

7221897 is a deficient number, since it is larger than the sum of its proper divisors (3261927).

7221897 is a wasteful number, since it uses less digits than its factorization.

7221897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020 (or 4017 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 7221897 is about 2687.3587404736. The cubic root of 7221897 is about 193.2934317839.

It can be divided in two parts, 7221 and 897, that added together give a palindrome (8118).

The spelling of 7221897 in words is "seven million, two hundred twenty-one thousand, eight hundred ninety-seven".