445021252321 has 4 divisors (see below), whose sum is σ = 445064641200. Its totient is φ = 444977863444.

The previous prime is 445021252309. The next prime is 445021252381. The reversal of 445021252321 is 123252120544.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 445021252321 - 2⁵ = 445021252289 is a prime.

It is a super-2 number, since 2×445021252321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445021252381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21679051 + ... + 21699568.

It is an arithmetic number, because the mean of its divisors is an integer number (111266160300).

Almost surely, 2^445021252321 is an apocalyptic number.

It is an amenable number.

445021252321 is a deficient number, since it is larger than the sum of its proper divisors (43388879).

445021252321 is a wasteful number, since it uses less digits than its factorization.

445021252321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43388878.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 445021252321 its reverse (123252120544), we get a palindrome (568273372865).

The spelling of 445021252321 in words is "four hundred forty-five billion, twenty-one million, two hundred fifty-two thousand, three hundred twenty-one".