2215581320 has 16 divisors (see below), whose sum is σ = 4985058060. Its totient is φ = 886232512.

The previous prime is 2215581289. The next prime is 2215581373. The reversal of 2215581320 is 231855122.

It can be written as a sum of positive squares in 2 ways, for example, as 2204678116 + 10903204 = 46954^2 + 3302^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27694727 + ... + 27694806.

Almost surely, 2^2215581320 is an apocalyptic number.

2215581320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215581320 is an abundant number, since it is smaller than the sum of its proper divisors (2769476740).

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

2215581320 is a wasteful number, since it uses less digits than its factorization.

2215581320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55389544 (or 55389540 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 2215581320 is about 47069.9619715164. The cubic root of 2215581320 is about 1303.6546706857.

The spelling of 2215581320 in words is "two billion, two hundred fifteen million, five hundred eighty-one thousand, three hundred twenty".