421313445240 has 128 divisors (see below), whose sum is σ = 1319238835200. Its totient is φ = 107437383680.

The previous prime is 421313445221. The next prime is 421313445247. The reversal of 421313445240 is 42544313124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421313445247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11819845 + ... + 11855435.

It is an arithmetic number, because the mean of its divisors is an integer number (10306553400).

Almost surely, 2^421313445240 is an apocalyptic number.

421313445240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421313445240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659619417600).

421313445240 is an abundant number, since it is smaller than the sum of its proper divisors (897925389960).

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

421313445240 is a wasteful number, since it uses less digits than its factorization.

421313445240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39917 (or 39913 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 421313445240 its reverse (42544313124), we get a palindrome (463857758364).

The spelling of 421313445240 in words is "four hundred twenty-one billion, three hundred thirteen million, four hundred forty-five thousand, two hundred forty".