220241220 has 24 divisors (see below), whose sum is σ = 616675584. Its totient is φ = 58730976.

The previous prime is 220241173. The next prime is 220241233. The reversal of 220241220 is 22142022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 220241220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1835284 + ... + 1835403.

It is an arithmetic number, because the mean of its divisors is an integer number (25694816).

Almost surely, 2^220241220 is an apocalyptic number.

220241220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220241220 is an abundant number, since it is smaller than the sum of its proper divisors (396434364).

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

220241220 is a wasteful number, since it uses less digits than its factorization.

220241220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670699 (or 3670697 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 220241220 is about 14840.5262709919. The cubic root of 220241220 is about 603.9016293754.

Adding to 220241220 its reverse (22142022), we get a palindrome (242383242).

The spelling of 220241220 in words is "two hundred twenty million, two hundred forty-one thousand, two hundred twenty".