221481063473 has 2 divisors, whose sum is σ = 221481063474. Its totient is φ = 221481063472.

The previous prime is 221481063457. The next prime is 221481063481. The reversal of 221481063473 is 374360184122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193887866929 + 27593196544 = 440327^2 + 166112^2 .

It is a cyclic number.

It is not a de Polignac number, because 221481063473 - 2⁴ = 221481063457 is a prime.

It is a super-2 number, since 2×221481063473² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221481063473.

It is not a weakly prime, because it can be changed into another prime (221481063403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110740531736 + 110740531737.

It is an arithmetic number, because the mean of its divisors is an integer number (110740531737).

Almost surely, 2^221481063473 is an apocalyptic number.

It is an amenable number.

221481063473 is a deficient number, since it is larger than the sum of its proper divisors (1).

221481063473 is an equidigital number, since it uses as much as digits as its factorization.

221481063473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 221481063473 in words is "two hundred twenty-one billion, four hundred eighty-one million, sixty-three thousand, four hundred seventy-three".