445525521 has 32 divisors (see below), whose sum is σ = 724992000. Its totient is φ = 237867840.

The previous prime is 445525513. The next prime is 445525523. The reversal of 445525521 is 125525544.

It is not a de Polignac number, because 445525521 - 2³ = 445525513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445525523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7080 + ... + 30678.

It is an arithmetic number, because the mean of its divisors is an integer number (22656000).

Almost surely, 2^445525521 is an apocalyptic number.

It is an amenable number.

445525521 is a deficient number, since it is larger than the sum of its proper divisors (279466479).

445525521 is a wasteful number, since it uses less digits than its factorization.

445525521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23669.

The product of its digits is 40000, while the sum is 33.

The square root of 445525521 is about 21107.4754767120. The cubic root of 445525521 is about 763.7610892143.

The spelling of 445525521 in words is "four hundred forty-five million, five hundred twenty-five thousand, five hundred twenty-one".