2271856897 has 16 divisors (see below), whose sum is σ = 2496465360. Its totient is φ = 2057832448.

The previous prime is 2271856841. The next prime is 2271856903. The reversal of 2271856897 is 7986581722.

It is a Cunningham number, because it is equal to 47664²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 140280336 + 2131576561 = 11844^2 + 46169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2271856897 is a prime.

It is a super-2 number, since 2×2271856897² = 10322667520892937218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2271850897) 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 15 ways as a sum of consecutive naturals, for example, 149013 + ... + 163549.

It is an arithmetic number, because the mean of its divisors is an integer number (156029085).

Almost surely, 2^2271856897 is an apocalyptic number.

It is an amenable number.

2271856897 is a deficient number, since it is larger than the sum of its proper divisors (224608463).

2271856897 is a wasteful number, since it uses less digits than its factorization.

2271856897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14900.

The product of its digits is 3386880, while the sum is 55.

The square root of 2271856897 is about 47664.0000104901. Note that the first 4 decimals coincide. The cubic root of 2271856897 is about 1314.6000888923.

The spelling of 2271856897 in words is "two billion, two hundred seventy-one million, eight hundred fifty-six thousand, eight hundred ninety-seven".