221452466421573 has 48 divisors (see below), whose sum is σ = 348037284521472. Its totient is φ = 140530385592000.

The previous prime is 221452466421499. The next prime is 221452466421581. The reversal of 221452466421573 is 375124664254122.

221452466421573 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 5 + 2 + 4 + 6 + 64 + 2 + 1 + 573 = 666.

It is not a de Polignac number, because 221452466421573 - 2⁹ = 221452466421061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221452466421073) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 240504798 + ... + 241423823.

It is an arithmetic number, because the mean of its divisors is an integer number (7250776760864).

Almost surely, 2^{221452466421573} is an apocalyptic number.

It is an amenable number.

221452466421573 is a deficient number, since it is larger than the sum of its proper divisors (126584818099899).

221452466421573 is an equidigital number, since it uses as much as digits as its factorization.

221452466421573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481928728 (or 481928716 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 54.

The spelling of 221452466421573 in words is "two hundred twenty-one trillion, four hundred fifty-two billion, four hundred sixty-six million, four hundred twenty-one thousand, five hundred seventy-three".