2220751780 has 24 divisors (see below), whose sum is σ = 5022316152. Its totient is φ = 819969792.

The previous prime is 2220751747. The next prime is 2220751831. The reversal of 2220751780 is 871570222.

It can be written as a sum of positive squares in 4 ways, for example, as 90744676 + 2130007104 = 9526^2 + 46152^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4270417 + ... + 4270936.

It is an arithmetic number, because the mean of its divisors is an integer number (209263173).

Almost surely, 2^2220751780 is an apocalyptic number.

2220751780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2220751780 is an abundant number, since it is smaller than the sum of its proper divisors (2801564372).

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

2220751780 is a wasteful number, since it uses less digits than its factorization.

2220751780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8541375 (or 8541373 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 2220751780 is about 47124.8531032193. The cubic root of 2220751780 is about 1304.6679875471.

The spelling of 2220751780 in words is "two billion, two hundred twenty million, seven hundred fifty-one thousand, seven hundred eighty".