421559221548 has 12 divisors (see below), whose sum is σ = 983638183640. Its totient is φ = 140519740512.

The previous prime is 421559221547. The next prime is 421559221583. The reversal of 421559221548 is 845122955124.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 421559221497 and 421559221506.

It is not an unprimeable number, because it can be changed into a prime (421559221547) 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 3 ways as a sum of consecutive naturals, for example, 17564967553 + ... + 17564967576.

Almost surely, 2^421559221548 is an apocalyptic number.

It is an amenable number.

421559221548 is an abundant number, since it is smaller than the sum of its proper divisors (562078962092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421559221548 is a wasteful number, since it uses less digits than its factorization.

421559221548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35129935136 (or 35129935134 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 48.

The spelling of 421559221548 in words is "four hundred twenty-one billion, five hundred fifty-nine million, two hundred twenty-one thousand, five hundred forty-eight".