2225278420 has 48 divisors (see below), whose sum is σ = 4824561168. Its totient is φ = 861511680.

The previous prime is 2225278387. The next prime is 2225278441. The reversal of 2225278420 is 248725222.

It can be written as a sum of positive squares in 8 ways, for example, as 13645636 + 2211632784 = 3694^2 + 47028^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135030 + ... + 150610.

It is an arithmetic number, because the mean of its divisors is an integer number (100511691).

Almost surely, 2^2225278420 is an apocalyptic number.

2225278420 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 2225278420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2412280584).

2225278420 is an abundant number, since it is smaller than the sum of its proper divisors (2599282748).

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

2225278420 is a wasteful number, since it uses less digits than its factorization.

2225278420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15820 (or 15818 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 2225278420 is about 47172.8568140620. The cubic root of 2225278420 is about 1305.5538368416.

The spelling of 2225278420 in words is "two billion, two hundred twenty-five million, two hundred seventy-eight thousand, four hundred twenty".