2220725720 has 64 divisors (see below), whose sum is σ = 5116785120. Its totient is φ = 867170304.

The previous prime is 2220725711. The next prime is 2220725729. The reversal of 2220725720 is 275270222.

It is an interprime number because it is at equal distance from previous prime (2220725711) and next prime (2220725729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220725729) 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, 299174 + ... + 306506.

Almost surely, 2^2220725720 is an apocalyptic number.

2220725720 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 2220725720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2558392560).

2220725720 is an abundant number, since it is smaller than the sum of its proper divisors (2896059400).

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

2220725720 is a wasteful number, since it uses less digits than its factorization.

2220725720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524 (or 7520 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 2220725720 is about 47124.5766028725. The cubic root of 2220725720 is about 1304.6628842031.

Adding to 2220725720 its reverse (275270222), we get a palindrome (2495995942).

The spelling of 2220725720 in words is "two billion, two hundred twenty million, seven hundred twenty-five thousand, seven hundred twenty".