2209825720 has 32 divisors (see below), whose sum is σ = 4973490720. Its totient is φ = 883684480.

The previous prime is 2209825697. The next prime is 2209825727. The reversal of 2209825720 is 275289022.

2209825720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2209825720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209825727) 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, 224829 + ... + 234451.

It is an arithmetic number, because the mean of its divisors is an integer number (155421585).

Almost surely, 2^2209825720 is an apocalyptic number.

2209825720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2209825720 is an abundant number, since it is smaller than the sum of its proper divisors (2763665000).

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

2209825720 is a wasteful number, since it uses less digits than its factorization.

2209825720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15375 (or 15371 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 2209825720 is about 47008.7834345881. The cubic root of 2209825720 is about 1302.5248210045.

The spelling of 2209825720 in words is "two billion, two hundred nine million, eight hundred twenty-five thousand, seven hundred twenty".