42447305821 has 8 divisors (see below), whose sum is σ = 43444200800. Its totient is φ = 41450854032.

The previous prime is 42447305807. The next prime is 42447305903. The reversal of 42447305821 is 12850374424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42447305821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42447308821) 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 7 ways as a sum of consecutive naturals, for example, 87106 + ... + 304108.

It is an arithmetic number, because the mean of its divisors is an integer number (5430525100).

Almost surely, 2^42447305821 is an apocalyptic number.

It is an amenable number.

42447305821 is a deficient number, since it is larger than the sum of its proper divisors (996894979).

42447305821 is a wasteful number, since it uses less digits than its factorization.

42447305821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221595.

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 42447305821 in words is "forty-two billion, four hundred forty-seven million, three hundred five thousand, eight hundred twenty-one".