2212782891 has 16 divisors (see below), whose sum is σ = 3305584128. Its totient is φ = 1304834400.

The previous prime is 2212782863. The next prime is 2212782931. The reversal of 2212782891 is 1982872122.

It is not a de Polignac number, because 2212782891 - 2²² = 2208588587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2212782851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 904915 + ... + 907356.

It is an arithmetic number, because the mean of its divisors is an integer number (206599008).

Almost surely, 2^2212782891 is an apocalyptic number.

2212782891 is a deficient number, since it is larger than the sum of its proper divisors (1092801237).

2212782891 is a wasteful number, since it uses less digits than its factorization.

2212782891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812322.

The product of its digits is 64512, while the sum is 42.

The square root of 2212782891 is about 47040.2263068536. The cubic root of 2212782891 is about 1303.1055714417.

The spelling of 2212782891 in words is "two billion, two hundred twelve million, seven hundred eighty-two thousand, eight hundred ninety-one".