7132221 has 12 divisors (see below), whose sum is σ = 10394748. Its totient is φ = 4712064.

The previous prime is 7132211. The next prime is 7132241. The reversal of 7132221 is 1222317.

It can be written as a sum of positive squares in 2 ways, for example, as 2595321 + 4536900 = 1611^2 + 2130^2 .

It is not a de Polignac number, because 7132221 - 2⁵ = 7132189 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7132194 and 7132203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7132211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2490 + ... + 4523.

It is an arithmetic number, because the mean of its divisors is an integer number (866229).

Almost surely, 2^7132221 is an apocalyptic number.

It is an amenable number.

7132221 is a deficient number, since it is larger than the sum of its proper divisors (3262527).

7132221 is a wasteful number, since it uses less digits than its factorization.

7132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7132 (or 7129 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 7132221 is about 2670.6218377000. The cubic root of 7132221 is about 192.4900405259.

Adding to 7132221 its reverse (1222317), we get a palindrome (8354538).

The spelling of 7132221 in words is "seven million, one hundred thirty-two thousand, two hundred twenty-one".