2221286215680 has 832 divisors, whose sum is σ = 9556247047680. Its totient is φ = 477842374656.

The previous prime is 2221286215651. The next prime is 2221286215717. The reversal of 2221286215680 is 865126821222.

2221286215680 is a `hidden beast` number, since 2 + 2 + 2 + 1 + 2 + 86 + 2 + 1 + 568 + 0 = 666.

It is a super-2 number, since 2×2221286215680² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65785362 + ... + 65819118.

Almost surely, 2^{2221286215680} is an apocalyptic number.

2221286215680 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 2221286215680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4778123523840).

2221286215680 is an abundant number, since it is smaller than the sum of its proper divisors (7334960832000).

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

2221286215680 is a wasteful number, since it uses less digits than its factorization.

2221286215680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33819 (or 33791 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 2221286215680 in words is "two trillion, two hundred twenty-one billion, two hundred eighty-six million, two hundred fifteen thousand, six hundred eighty".