80216220 has 192 divisors, whose sum is σ = 271982592. Its totient is φ = 17280000.

The previous prime is 80216209. The next prime is 80216231. The reversal of 80216220 is 2261208.

It is an interprime number because it is at equal distance from previous prime (80216209) and next prime (80216231).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 794170 + ... + 794270.

It is an arithmetic number, because the mean of its divisors is an integer number (1416576).

Almost surely, 2^80216220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80216220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135991296).

80216220 is an abundant number, since it is smaller than the sum of its proper divisors (191766372).

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

80216220 is a wasteful number, since it uses less digits than its factorization.

80216220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 80216220 is about 8956.3508193907. The cubic root of 80216220 is about 431.2747820247.

Adding to 80216220 its reverse (2261208), we get a palindrome (82477428).

It can be divided in two parts, 8021 and 6220, that added together give a palindrome (14241).

The spelling of 80216220 in words is "eighty million, two hundred sixteen thousand, two hundred twenty".