2271681555 has 32 divisors (see below), whose sum is σ = 4270129920. Its totient is φ = 1016695680.

The previous prime is 2271681551. The next prime is 2271681569. The reversal of 2271681555 is 5551861722.

It is not a de Polignac number, because 2271681555 - 2² = 2271681551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2271681551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 527385 + ... + 531674.

It is an arithmetic number, because the mean of its divisors is an integer number (133441560).

Almost surely, 2^2271681555 is an apocalyptic number.

2271681555 is a deficient number, since it is larger than the sum of its proper divisors (1998448365).

2271681555 is a wasteful number, since it uses less digits than its factorization.

2271681555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059091.

The product of its digits is 168000, while the sum is 42.

The square root of 2271681555 is about 47662.1606203496. The cubic root of 2271681555 is about 1314.5662677276.

The spelling of 2271681555 in words is "two billion, two hundred seventy-one million, six hundred eighty-one thousand, five hundred fifty-five".