221452529 has 2 divisors, whose sum is σ = 221452530. Its totient is φ = 221452528.

The previous prime is 221452519. The next prime is 221452589. The reversal of 221452529 is 925254122.

221452529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203005504 + 18447025 = 14248^2 + 4295^2 .

It is a cyclic number.

It is not a de Polignac number, because 221452529 - 2⁴ = 221452513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221452495 and 221452504.

It is not a weakly prime, because it can be changed into another prime (221452519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110726264 + 110726265.

It is an arithmetic number, because the mean of its divisors is an integer number (110726265).

Almost surely, 2^221452529 is an apocalyptic number.

It is an amenable number.

221452529 is a deficient number, since it is larger than the sum of its proper divisors (1).

221452529 is an equidigital number, since it uses as much as digits as its factorization.

221452529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The square root of 221452529 is about 14881.2811612441. The cubic root of 221452529 is about 605.0067426337.

The spelling of 221452529 in words is "two hundred twenty-one million, four hundred fifty-two thousand, five hundred twenty-nine".