220031320 has 32 divisors (see below), whose sum is σ = 495493200. Its totient is φ = 87937408.

The previous prime is 220031309. The next prime is 220031359. The reversal of 220031320 is 23130022.

It is a happy number.

220031320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 220031320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88251 + ... + 90709.

Almost surely, 2^220031320 is an apocalyptic number.

220031320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220031320 is an abundant number, since it is smaller than the sum of its proper divisors (275461880).

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

220031320 is a wasteful number, since it uses less digits than its factorization.

220031320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4707 (or 4703 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 220031320 is about 14833.4527336018. The cubic root of 220031320 is about 603.7097197314.

Adding to 220031320 its reverse (23130022), we get a palindrome (243161342).

The spelling of 220031320 in words is "two hundred twenty million, thirty-one thousand, three hundred twenty".