445445221403 has 16 divisors (see below), whose sum is σ = 577095025920. Its totient is φ = 333890690976.

The previous prime is 445445221399. The next prime is 445445221409. The reversal of 445445221403 is 304122544544.

It is a cyclic number.

It is not a de Polignac number, because 445445221403 - 2² = 445445221399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445445221409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128814125 + ... + 128817582.

It is an arithmetic number, because the mean of its divisors is an integer number (36068439120).

Almost surely, 2^445445221403 is an apocalyptic number.

445445221403 is a deficient number, since it is larger than the sum of its proper divisors (131649804517).

445445221403 is a wasteful number, since it uses less digits than its factorization.

445445221403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257631746.

The product of its (nonzero) digits is 307200, while the sum is 38.

Adding to 445445221403 its reverse (304122544544), we get a palindrome (749567765947).

The spelling of 445445221403 in words is "four hundred forty-five billion, four hundred forty-five million, two hundred twenty-one thousand, four hundred three".