2215422720 has 432 divisors, whose sum is σ = 8892479232. Its totient is φ = 498769920.

The previous prime is 2215422709. The next prime is 2215422731. The reversal of 2215422720 is 272245122.

2215422720 is a `hidden beast` number, since 2 + 215 + 422 + 7 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (2215422709) and next prime (2215422731).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6692955 + ... + 6693285.

Almost surely, 2^2215422720 is an apocalyptic number.

2215422720 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 2215422720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4446239616).

2215422720 is an abundant number, since it is smaller than the sum of its proper divisors (6677056512).

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

2215422720 is a wasteful number, since it uses less digits than its factorization.

2215422720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 2215422720 is about 47068.2772151265. The cubic root of 2215422720 is about 1303.6235630387.

Adding to 2215422720 its reverse (272245122), we get a palindrome (2487667842).

The spelling of 2215422720 in words is "two billion, two hundred fifteen million, four hundred twenty-two thousand, seven hundred twenty".