2211647856 has 40 divisors (see below), whose sum is σ = 6232827264. Its totient is φ = 670196160.

The previous prime is 2211647833. The next prime is 2211647881. The reversal of 2211647856 is 6587461122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2093836 + ... + 2094891.

Almost surely, 2^2211647856 is an apocalyptic number.

It is an amenable number.

2211647856 is an abundant number, since it is smaller than the sum of its proper divisors (4021179408).

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

2211647856 is a wasteful number, since it uses less digits than its factorization.

2211647856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188749 (or 4188743 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 2211647856 is about 47028.1602446874. The cubic root of 2211647856 is about 1302.8827263531.

The spelling of 2211647856 in words is "two billion, two hundred eleven million, six hundred forty-seven thousand, eight hundred fifty-six".