220231120 has 20 divisors (see below), whose sum is σ = 512037540. Its totient is φ = 88092416.

The previous prime is 220231103. The next prime is 220231139. The reversal of 220231120 is 21132022.

It can be written as a sum of positive squares in 2 ways, for example, as 29680704 + 190550416 = 5448^2 + 13804^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 220231120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376365 + ... + 1376524.

It is an arithmetic number, because the mean of its divisors is an integer number (25601877).

Almost surely, 2^220231120 is an apocalyptic number.

220231120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220231120 is an abundant number, since it is smaller than the sum of its proper divisors (291806420).

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

220231120 is a wasteful number, since it uses less digits than its factorization.

220231120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752902 (or 2752896 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 220231120 is about 14840.1859826621. The cubic root of 220231120 is about 603.8923978311.

Adding to 220231120 its reverse (21132022), we get a palindrome (241363142).

The spelling of 220231120 in words is "two hundred twenty million, two hundred thirty-one thousand, one hundred twenty".