221481063458 has 54 divisors (see below), whose sum is σ = 348179393457. Its totient is φ = 105663353040.

The previous prime is 221481063457. The next prime is 221481063473. The reversal of 221481063458 is 854360184122.

It can be written as a sum of positive squares in 2 ways, for example, as 212523766009 + 8957297449 = 461003^2 + 94643^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332777.

It is a super-2 number, since 2×221481063458² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221481063457) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2031936308 + ... + 2031936416.

Almost surely, 2^221481063458 is an apocalyptic number.

221481063458 is a deficient number, since it is larger than the sum of its proper divisors (126698329999).

221481063458 is an frugal number, since it uses more digits than its factorization.

221481063458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 221481063458 in words is "two hundred twenty-one billion, four hundred eighty-one million, sixty-three thousand, four hundred fifty-eight".