42242220424 has 8 divisors (see below), whose sum is σ = 79204163310. Its totient is φ = 21121110208.

The previous prime is 42242220407. The next prime is 42242220451. The reversal of 42242220424 is 42402224224.

It can be written as a sum of positive squares in only one way, i.e., 26117792100 + 16124428324 = 161610^2 + 126982^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 42242220392 and 42242220401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2640138769 + ... + 2640138784.

Almost surely, 2^42242220424 is an apocalyptic number.

It is an amenable number.

42242220424 is a deficient number, since it is larger than the sum of its proper divisors (36961942886).

42242220424 is a wasteful number, since it uses less digits than its factorization.

42242220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280277559 (or 5280277555 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 42242220424 its reverse (42402224224), we get a palindrome (84644444648).

The spelling of 42242220424 in words is "forty-two billion, two hundred forty-two million, two hundred twenty thousand, four hundred twenty-four".