7532221 has 2 divisors, whose sum is σ = 7532222. Its totient is φ = 7532220.

The previous prime is 7532209. The next prime is 7532249. The reversal of 7532221 is 1222357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6125625 + 1406596 = 2475^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 7532221 - 2⁹ = 7531709 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 7532192 and 7532201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7532251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3766110 + 3766111.

It is an arithmetic number, because the mean of its divisors is an integer number (3766111).

Almost surely, 2^7532221 is an apocalyptic number.

It is an amenable number.

7532221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7532221 is an equidigital number, since it uses as much as digits as its factorization.

7532221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 22.

The square root of 7532221 is about 2744.4892056629. The cubic root of 7532221 is about 196.0232948156.

Adding to 7532221 its reverse (1222357), we get a palindrome (8754578).

The spelling of 7532221 in words is "seven million, five hundred thirty-two thousand, two hundred twenty-one".