84550220 has 12 divisors (see below), whose sum is σ = 177555504. Its totient is φ = 33820080.

The previous prime is 84550201. The next prime is 84550243. The reversal of 84550220 is 2205548.

It is a self number, because there is not a number n which added to its sum of digits gives 84550220.

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, 2113736 + ... + 2113775.

It is an arithmetic number, because the mean of its divisors is an integer number (14796292).

Almost surely, 2^84550220 is an apocalyptic number.

It is an amenable number.

84550220 is an abundant number, since it is smaller than the sum of its proper divisors (93005284).

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

84550220 is a wasteful number, since it uses less digits than its factorization.

84550220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4227520 (or 4227518 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 84550220 is about 9195.1193575723. The cubic root of 84550220 is about 438.9060634796.

Adding to 84550220 its reverse (2205548), we get a palindrome (86755768).

The spelling of 84550220 in words is "eighty-four million, five hundred fifty thousand, two hundred twenty".