220231220 has 48 divisors (see below), whose sum is σ = 521942400. Its totient is φ = 77320320.

The previous prime is 220231177. The next prime is 220231259. The reversal of 220231220 is 22132022.

220231220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 220231195 and 220231204.

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, 10880 + ... + 23639.

It is an arithmetic number, because the mean of its divisors is an integer number (10873800).

Almost surely, 2^220231220 is an apocalyptic number.

220231220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220231220 is an abundant number, since it is smaller than the sum of its proper divisors (301711180).

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

220231220 is a wasteful number, since it uses less digits than its factorization.

220231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34568 (or 34566 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 220231220 is about 14840.1893518917. The cubic root of 220231220 is about 603.8924892340.

Adding to 220231220 its reverse (22132022), we get a palindrome (242363242).

The spelling of 220231220 in words is "two hundred twenty million, two hundred thirty-one thousand, two hundred twenty".