2215224891 has 48 divisors (see below), whose sum is σ = 3596636160. Its totient is φ = 1302039360.

The previous prime is 2215224883. The next prime is 2215224901. The reversal of 2215224891 is 1984225122.

2215224891 is a `hidden beast` number, since 2 + 2 + 1 + 522 + 48 + 91 = 666.

It is not a de Polignac number, because 2215224891 - 2³ = 2215224883 is a prime.

It is a super-3 number, since 3×2215224891³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2215224871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1402140 + ... + 1403718.

It is an arithmetic number, because the mean of its divisors is an integer number (74929920).

Almost surely, 2^2215224891 is an apocalyptic number.

2215224891 is a deficient number, since it is larger than the sum of its proper divisors (1381411269).

2215224891 is a wasteful number, since it uses less digits than its factorization.

2215224891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016 (or 2013 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 2215224891 is about 47066.1756572594. The cubic root of 2215224891 is about 1303.5847589736.

The spelling of 2215224891 in words is "two billion, two hundred fifteen million, two hundred twenty-four thousand, eight hundred ninety-one".