1445172810221 has 8 divisors (see below), whose sum is σ = 1651644766464. Its totient is φ = 1238705528400.

The previous prime is 1445172810199. The next prime is 1445172810223. The reversal of 1445172810221 is 1220182715441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1445172810221 - 2¹⁴ = 1445172793837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445172810223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478970 + ... + 1766283.

It is an arithmetic number, because the mean of its divisors is an integer number (206455595808).

Almost surely, 2^{1445172810221} is an apocalyptic number.

It is an amenable number.

1445172810221 is a deficient number, since it is larger than the sum of its proper divisors (206471956243).

1445172810221 is an equidigital number, since it uses as much as digits as its factorization.

1445172810221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337211.

The product of its (nonzero) digits is 35840, while the sum is 38.

The spelling of 1445172810221 in words is "one trillion, four hundred forty-five billion, one hundred seventy-two million, eight hundred ten thousand, two hundred twenty-one".