2215866240 has 384 divisors, whose sum is σ = 9132631200. Its totient is φ = 506290176.

The previous prime is 2215866229. The next prime is 2215866259. The reversal of 2215866240 is 426685122.

It is a happy number.

2215866240 is a `hidden beast` number, since 2 + 21 + 5 + 8 + 6 + 624 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2215866195 and 2215866204.

It is a congruent number.

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, 845412 + ... + 848028.

Almost surely, 2^2215866240 is an apocalyptic number.

2215866240 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 2215866240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4566315600).

2215866240 is an abundant number, since it is smaller than the sum of its proper divisors (6916764960).

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

2215866240 is a wasteful number, since it uses less digits than its factorization.

2215866240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659 (or 2634 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 2215866240 is about 47072.9884328582. The cubic root of 2215866240 is about 1303.7105508836.

The spelling of 2215866240 in words is "two billion, two hundred fifteen million, eight hundred sixty-six thousand, two hundred forty".