2218205280 has 48 divisors (see below), whose sum is σ = 6987348144. Its totient is φ = 591521280.

The previous prime is 2218205257. The next prime is 2218205287. The reversal of 2218205280 is 825028122.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218205287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2310151 + ... + 2311110.

It is an arithmetic number, because the mean of its divisors is an integer number (145569753).

Almost surely, 2^2218205280 is an apocalyptic number.

2218205280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2218205280 is an abundant number, since it is smaller than the sum of its proper divisors (4769142864).

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

2218205280 is a wasteful number, since it uses less digits than its factorization.

2218205280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621279 (or 4621271 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 2218205280 is about 47097.8267014519. The cubic root of 2218205280 is about 1304.1691162850.

The spelling of 2218205280 in words is "two billion, two hundred eighteen million, two hundred five thousand, two hundred eighty".