532640221 has 2 divisors, whose sum is σ = 532640222. Its totient is φ = 532640220.

The previous prime is 532640219. The next prime is 532640239. The reversal of 532640221 is 122046235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 495552121 + 37088100 = 22261^2 + 6090^2 .

It is a cyclic number.

It is not a de Polignac number, because 532640221 - 2¹ = 532640219 is a prime.

It is a super-3 number, since 3×532640221³ (a number of 27 digits) contains 333 as substring.

Together with 532640219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (532640621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266320110 + 266320111.

It is an arithmetic number, because the mean of its divisors is an integer number (266320111).

Almost surely, 2^532640221 is an apocalyptic number.

It is an amenable number.

532640221 is a deficient number, since it is larger than the sum of its proper divisors (1).

532640221 is an equidigital number, since it uses as much as digits as its factorization.

532640221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 532640221 is about 23078.9995667057. Note that the first 3 decimals coincide. The cubic root of 532640221 is about 810.6088096818.

Adding to 532640221 its reverse (122046235), we get a palindrome (654686456).

The spelling of 532640221 in words is "five hundred thirty-two million, six hundred forty thousand, two hundred twenty-one".