7332221 has 4 divisors (see below), whose sum is σ = 7896252. Its totient is φ = 6768192.

The previous prime is 7332209. The next prime is 7332257. The reversal of 7332221 is 1222337.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222337 = 163 ⋅7499.

It can be written as a sum of positive squares in 2 ways, for example, as 5040025 + 2292196 = 2245^2 + 1514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7332221 is a prime.

It is a super-2 number, since 2×7332221² = 107522929585682, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 7332193 and 7332202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7332121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281996 + ... + 282021.

It is an arithmetic number, because the mean of its divisors is an integer number (1974063).

Almost surely, 2^7332221 is an apocalyptic number.

It is an amenable number.

7332221 is a deficient number, since it is larger than the sum of its proper divisors (564031).

7332221 is a wasteful number, since it uses less digits than its factorization.

7332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564030.

The product of its digits is 504, while the sum is 20.

The square root of 7332221 is about 2707.8074156040. The cubic root of 7332221 is about 194.2727325679.

Adding to 7332221 its reverse (1222337), we get a palindrome (8554558).

The spelling of 7332221 in words is "seven million, three hundred thirty-two thousand, two hundred twenty-one".