2225664440 has 32 divisors (see below), whose sum is σ = 5014872000. Its totient is φ = 888998784.

The previous prime is 2225664407. The next prime is 2225664443. The reversal of 2225664440 is 444665222.

It is a self number, because there is not a number n which added to its sum of digits gives 2225664440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2225664443) 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, 10880 + ... + 67599.

It is an arithmetic number, because the mean of its divisors is an integer number (156714750).

Almost surely, 2^2225664440 is an apocalyptic number.

2225664440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2225664440 is an abundant number, since it is smaller than the sum of its proper divisors (2789207560).

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

2225664440 is a wasteful number, since it uses less digits than its factorization.

2225664440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79199 (or 79195 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

The square root of 2225664440 is about 47176.9481844682. The cubic root of 2225664440 is about 1305.6293241378.

The spelling of 2225664440 in words is "two billion, two hundred twenty-five million, six hundred sixty-four thousand, four hundred forty".