536447221 has 2 divisors, whose sum is σ = 536447222. Its totient is φ = 536447220.

The previous prime is 536447207. The next prime is 536447251. The reversal of 536447221 is 122744635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399440196 + 137007025 = 19986^2 + 11705^2 .

It is a cyclic number.

It is not a de Polignac number, because 536447221 - 2²⁷ = 402229493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (536447251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268223610 + 268223611.

It is an arithmetic number, because the mean of its divisors is an integer number (268223611).

Almost surely, 2^536447221 is an apocalyptic number.

It is an amenable number.

536447221 is a deficient number, since it is larger than the sum of its proper divisors (1).

536447221 is an equidigital number, since it uses as much as digits as its factorization.

536447221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 34.

The square root of 536447221 is about 23161.3302942642. The cubic root of 536447221 is about 812.5354788768.

The spelling of 536447221 in words is "five hundred thirty-six million, four hundred forty-seven thousand, two hundred twenty-one".