42721324240 has 120 divisors (see below), whose sum is σ = 120567640320. Its totient is φ = 14010441984.

The previous prime is 42721324199. The next prime is 42721324339. The reversal of 42721324240 is 4242312724.

42721324240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42721324240² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146760 + ... + 327079.

It is an arithmetic number, because the mean of its divisors is an integer number (1004730336).

Almost surely, 2^42721324240 is an apocalyptic number.

42721324240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42721324240 is an abundant number, since it is smaller than the sum of its proper divisors (77846316080).

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

42721324240 is a wasteful number, since it uses less digits than its factorization.

42721324240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473889 (or 473876 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 31.

Adding to 42721324240 its reverse (4242312724), we get a palindrome (46963636964).

The spelling of 42721324240 in words is "forty-two billion, seven hundred twenty-one million, three hundred twenty-four thousand, two hundred forty".