431443123220 has 12 divisors (see below), whose sum is σ = 906030558804. Its totient is φ = 172577249280.

The previous prime is 431443123183. The next prime is 431443123229. The reversal of 431443123220 is 22321344134.

It can be written as a sum of positive squares in 2 ways, for example, as 238179137296 + 193263985924 = 488036^2 + 439618^2 .

It is a super-2 number, since 2×431443123220² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431443123229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10786078061 + ... + 10786078100.

It is an arithmetic number, because the mean of its divisors is an integer number (75502546567).

Almost surely, 2^431443123220 is an apocalyptic number.

It is an amenable number.

431443123220 is an abundant number, since it is smaller than the sum of its proper divisors (474587435584).

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

431443123220 is a wasteful number, since it uses less digits than its factorization.

431443123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21572156170 (or 21572156168 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 431443123220 its reverse (22321344134), we get a palindrome (453764467354).

The spelling of 431443123220 in words is "four hundred thirty-one billion, four hundred forty-three million, one hundred twenty-three thousand, two hundred twenty".