445221523 has 2 divisors, whose sum is σ = 445221524. Its totient is φ = 445221522.

The previous prime is 445221503. The next prime is 445221577. The reversal of 445221523 is 325122544.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445221523 - 2¹³ = 445213331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 445221491 and 445221500.

It is not a weakly prime, because it can be changed into another prime (445221503) 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 as a sum of consecutive naturals, namely, 222610761 + 222610762.

It is an arithmetic number, because the mean of its divisors is an integer number (222610762).

Almost surely, 2^445221523 is an apocalyptic number.

445221523 is a deficient number, since it is larger than the sum of its proper divisors (1).

445221523 is an equidigital number, since it uses as much as digits as its factorization.

445221523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 28.

The square root of 445221523 is about 21100.2730551052. The cubic root of 445221523 is about 763.5873358516.

The spelling of 445221523 in words is "four hundred forty-five million, two hundred twenty-one thousand, five hundred twenty-three".