445332521 has 2 divisors, whose sum is σ = 445332522. Its totient is φ = 445332520.

The previous prime is 445332499. The next prime is 445332523. The reversal of 445332521 is 125233544.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309936025 + 135396496 = 17605^2 + 11636^2 .

It is a cyclic number.

It is not a de Polignac number, because 445332521 - 2⁶ = 445332457 is a prime.

Together with 445332523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (445332523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222666260 + 222666261.

It is an arithmetic number, because the mean of its divisors is an integer number (222666261).

Almost surely, 2^445332521 is an apocalyptic number.

It is an amenable number.

445332521 is a deficient number, since it is larger than the sum of its proper divisors (1).

445332521 is an equidigital number, since it uses as much as digits as its factorization.

445332521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 29.

The square root of 445332521 is about 21102.9031415111. The cubic root of 445332521 is about 763.6507871301.

The spelling of 445332521 in words is "four hundred forty-five million, three hundred thirty-two thousand, five hundred twenty-one".