421431321340 has 48 divisors (see below), whose sum is σ = 940808725920. Its totient is φ = 158119084800.

The previous prime is 421431321331. The next prime is 421431321361. The reversal of 421431321340 is 43123134124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 421431321299 and 421431321308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5451867 + ... + 5528626.

It is an arithmetic number, because the mean of its divisors is an integer number (19600181790).

Almost surely, 2^421431321340 is an apocalyptic number.

It is an amenable number.

421431321340 is an abundant number, since it is smaller than the sum of its proper divisors (519377404580).

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

421431321340 is a wasteful number, since it uses less digits than its factorization.

421431321340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10980622 (or 10980620 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 421431321340 its reverse (43123134124), we get a palindrome (464554455464).

The spelling of 421431321340 in words is "four hundred twenty-one billion, four hundred thirty-one million, three hundred twenty-one thousand, three hundred forty".