447221793517 has 2 divisors, whose sum is σ = 447221793518. Its totient is φ = 447221793516.

The previous prime is 447221793467. The next prime is 447221793587. The reversal of 447221793517 is 715397122744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243686373316 + 203535420201 = 493646^2 + 451149^2 .

It is a cyclic number.

It is not a de Polignac number, because 447221793517 - 2¹¹ = 447221791469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447221793587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223610896758 + 223610896759.

It is an arithmetic number, because the mean of its divisors is an integer number (223610896759).

Almost surely, 2^447221793517 is an apocalyptic number.

It is an amenable number.

447221793517 is a deficient number, since it is larger than the sum of its proper divisors (1).

447221793517 is an equidigital number, since it uses as much as digits as its factorization.

447221793517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 52.

The spelling of 447221793517 in words is "four hundred forty-seven billion, two hundred twenty-one million, seven hundred ninety-three thousand, five hundred seventeen".