2218273520 has 80 divisors (see below), whose sum is σ = 5268650880. Its totient is φ = 868361472.

The previous prime is 2218273511. The next prime is 2218273529. The reversal of 2218273520 is 253728122.

It is an interprime number because it is at equal distance from previous prime (2218273511) and next prime (2218273529).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218273529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 872411 + ... + 874949.

It is an arithmetic number, because the mean of its divisors is an integer number (65858136).

Almost surely, 2^2218273520 is an apocalyptic number.

2218273520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2218273520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2634325440).

2218273520 is an abundant number, since it is smaller than the sum of its proper divisors (3050377360).

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

2218273520 is a wasteful number, since it uses less digits than its factorization.

2218273520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782 (or 2776 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 2218273520 is about 47098.5511454440. The cubic root of 2218273520 is about 1304.1824897975.

The spelling of 2218273520 in words is "two billion, two hundred eighteen million, two hundred seventy-three thousand, five hundred twenty".