431220220 has 12 divisors (see below), whose sum is σ = 905562504. Its totient is φ = 172488080.

The previous prime is 431220217. The next prime is 431220239. The reversal of 431220220 is 22022134.

It is a junction number, because it is equal to n+sod(n) for n = 431220194 and 431220203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10780486 + ... + 10780525.

It is an arithmetic number, because the mean of its divisors is an integer number (75463542).

Almost surely, 2^431220220 is an apocalyptic number.

It is an amenable number.

431220220 is an abundant number, since it is smaller than the sum of its proper divisors (474342284).

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

431220220 is a wasteful number, since it uses less digits than its factorization.

431220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21561020 (or 21561018 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 431220220 is about 20765.8426267753. The cubic root of 431220220 is about 755.4975128262.

Adding to 431220220 its reverse (22022134), we get a palindrome (453242354).

The spelling of 431220220 in words is "four hundred thirty-one million, two hundred twenty thousand, two hundred twenty".