532145221 has 2 divisors, whose sum is σ = 532145222. Its totient is φ = 532145220.

The previous prime is 532145177. The next prime is 532145279. The reversal of 532145221 is 122541235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272613121 + 259532100 = 16511^2 + 16110^2 .

It is a cyclic number.

It is not a de Polignac number, because 532145221 - 2⁷ = 532145093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (532145921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266072610 + 266072611.

It is an arithmetic number, because the mean of its divisors is an integer number (266072611).

Almost surely, 2^532145221 is an apocalyptic number.

It is an amenable number.

532145221 is a deficient number, since it is larger than the sum of its proper divisors (1).

532145221 is an equidigital number, since it uses as much as digits as its factorization.

532145221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 25.

The square root of 532145221 is about 23068.2730389598. The cubic root of 532145221 is about 810.3576234165.

Adding to 532145221 its reverse (122541235), we get a palindrome (654686456).

The spelling of 532145221 in words is "five hundred thirty-two million, one hundred forty-five thousand, two hundred twenty-one".