431121320 has 32 divisors (see below), whose sum is σ = 1108598400. Its totient is φ = 147812928.

The previous prime is 431121307. The next prime is 431121323. The reversal of 431121320 is 23121134.

It is not an unprimeable number, because it can be changed into a prime (431121323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769580 + ... + 770139.

It is an arithmetic number, because the mean of its divisors is an integer number (34643700).

Almost surely, 2^431121320 is an apocalyptic number.

431121320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431121320 is an abundant number, since it is smaller than the sum of its proper divisors (677477080).

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

431121320 is a wasteful number, since it uses less digits than its factorization.

431121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539737 (or 1539733 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 431121320 is about 20763.4611758252. The cubic root of 431121320 is about 755.4397508340.

Adding to 431121320 its reverse (23121134), we get a palindrome (454242454).

The spelling of 431121320 in words is "four hundred thirty-one million, one hundred twenty-one thousand, three hundred twenty".