220031220 has 48 divisors (see below), whose sum is σ = 618770880. Its totient is φ = 58419456.

The previous prime is 220031219. The next prime is 220031233. The reversal of 220031220 is 22130022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 220031196 and 220031205.

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, 6111 + ... + 21849.

It is an arithmetic number, because the mean of its divisors is an integer number (12891060).

Almost surely, 2^220031220 is an apocalyptic number.

220031220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220031220 is an abundant number, since it is smaller than the sum of its proper divisors (398739660).

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

220031220 is a wasteful number, since it uses less digits than its factorization.

220031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15984 (or 15982 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 220031220 is about 14833.4493628421. The cubic root of 220031220 is about 603.7096282732.

Adding to 220031220 its reverse (22130022), we get a palindrome (242161242).

The spelling of 220031220 in words is "two hundred twenty million, thirty-one thousand, two hundred twenty".